[1153] Russell J. Frackman and Jeffrey D. Goldman, Mitchell, Silberberg & Knupp LLP, Los Angeles, CA, Jeffrey N. Mausner, Berman, Mausner & Resser, Los Angeles, CA, Daniel J. Cooper, Perfect 10, Inc., Beverly Hills, CA, for plaintiff-appellant Perfect 10, Inc.

Andrew P. Bridges and Jennifer A. Golinveaux, Winston & Strawn LLP, San Francisco, CA, Gene C. Schaerr, Winston & Strawn LLP, Washington, DC, for defendant-appellee and cross-appellant Google Inc.

Mark T. Jansen & Anthony J. Malutta, Townsend and Townsend and Crew LLP, San Francisco, CA, for defendants-appellees Amazon.com and A9.com, Inc.

Fred von Lohmann, Electronic Frontier Foundation, San Francisco, CA, for amicus curiae Electronic Frontier Foundation, American Library Association, Medical Library [1154] Association, American Association of Law Libraries, Association of Research Libraries, and Special Libraries Association in support of Google Inc.

Victor S. Perlman, of counsel, American Society of Media Photographers; Nancy E. Wolff, of counsel, Cowan, DeBaets, Abrahams & Sheppard, LLP; Robert W. Clarida and Jason D. Sanders, Cowan, Liebowitz & Latman, P.C., New York, NY, for amicus curiae American Society of Media Photographers, Inc., Picture Archive Council of America, Inc., British Association of Picture Libraries and Agencies, Inc., Stock Artists Alliance, The Graphic Artists Guild, American Society of Picture Professionals and National Press Photographers, in support of Perfect 10 on issue of Google's liability for the display of full-size images.

Eric J. Schwartz and Steven J. Metalitz, Smith & Metalitz LLP, Washington, DC, for amicus curiae Motion Picture Association of America, Inc. in support of Perfect 10.

Jonathan Band, Jonathan Band PLLC, Washington, DC, for amicus curiae Net-Coalition, Computer and Communications Industry Association, U.S. Internet Service Provider Association, Consumer Electronics Association, Home Recording Rights Coalition, Information Technology Association of America, and Internet Commerce Coalition in support of Google Inc.

Kenneth L. Doroshow and Linda J. Zirkelbach, Recording Industry Association of America, Washington, DC; Jacqueline C. Charlesworth, National Music Publishers' Association, Washington, DC; Robert W. Clarida, Richard S. Mandel and Jonathan Z. King, Cowan, Liebowitz & Latman, P.C., New York, NY, for amicus curiae Recording Industry Association of America and National Music Publishers' Association in support of neither party.

Appeal from the United States District Court for the Central District of California; A. Howard Matz, District Judge, Presiding. D.C. Nos. CV-05-04753-AHM, CV-04-09484-AHM.

Before: CYNTHIA HOLCOMB HALL, HAWKINS, and SANDRA S. IKUTA, Circuit Judges.

IKUTA, Circuit Judge:

In this appeal, we consider a copyright owner's efforts to stop an Internet search engine from facilitating access to infringing images. Perfect 10, Inc. sued Google Inc., for infringing Perfect 10's copyrighted photographs of nude models, among other claims. Perfect 10 brought a similar action against Amazon.com and its subsidiary A9.com (collectively, "Amazon.com"). The district court preliminarily enjoined Google from creating and publicly displaying thumbnail versions of Perfect 10's images, Perfect 10 v. Google, Inc., 416 F.Supp.2d 828 (C.D.Cal.2006), but did not enjoin Google from linking to third-party websites that display infringing full-size versions of Perfect 10's images. Nor did the district court preliminarily enjoin Amazon.com from giving users access to information provided by Google. Perfect 10 and Google both appeal the district court's order. We have jurisdiction pursuant to 28 U.S.C. § 1292(a)(1).^[1]

[1155] The district court handled this complex case in a particularly thoughtful and skillful manner. Nonetheless, the district court erred on certain issues, as we will further explain below. We affirm in part, reverse in part, and remand.

I

Background

Google's computers, along with millions of others, are connected to networks known collectively as the "Internet." "The Internet is a world-wide network of networks ... all sharing a common communications technology." Religious Tech. Ctr. v. Netcom On-Line Commc'n Servs., Inc., 923 F.Supp. 1231, 1238 n. 1 (N.D.Cal.1995). Computer owners can provide information stored on their computers to other users connected to the Internet through a medium called a webpage. A webpage consists of text interspersed with instructions written in Hypertext Markup Language ("HTML") that is stored in a computer. No images are stored on a webpage; rather, the HTML instructions on the webpage provide an address for where the images are stored, whether in the webpage publisher's computer or some other computer. In general, webpages are publicly available and can be accessed by computers connected to the Internet through the use of a web browser.

Google operates a search engine, a software program that automatically accesses thousands of websites (collections of webpages) and indexes them within a database stored on Google's computers. When a Google user accesses the Google website and types in a search query, Google's software searches its database for websites responsive to that search query. Google then sends relevant information from its index of websites to the user's computer. Google's search engines can provide results in the form of text, images, or videos.

The Google search engine that provides responses in the form of images is called "Google Image Search." In response to a search query, Google Image Search identifies text in its database responsive to the query and then communicates to users the images associated with the relevant text. Google's software cannot recognize and index the images themselves. Google Image Search provides search results as a webpage of small images called "thumbnails," which are stored in Google's servers. The thumbnail images are reduced, lower-resolution versions of full-sized images stored on third-party computers.

When a user clicks on a thumbnail image, the user's browser program interprets HTML instructions on Google's webpage. These HTML instructions direct the user's browser to cause a rectangular area (a "window") to appear on the user's computer screen. The window has two separate areas of information. The browser fills the top section of the screen with information from the Google webpage, including the thumbnail image and text. The HTML instructions also give the user's browser the address of the website publisher's computer that stores the full-size version of the thumbnail.^[2] By following [1156] the HTML instructions to access the third-party webpage, the user's browser connects to the website publisher's computer, downloads the full-size image, and makes the image appear at the bottom of the window on the user's screen. Google does not store the images that fill this lower part of the window and does not communicate the images to the user; Google simply provides HTML instructions directing a user's browser to access a third-party website. However, the top part of the window (containing the information from the Google webpage) appears to frame and comment on the bottom part of the window. Thus, the user's window appears to be filled with a single integrated presentation of the full-size image, but it is actually an image from a third-party website framed by information from Google's website. The process by which the webpage directs a user's browser to incorporate content from different computers into a single window is referred to as "in-line linking." Kelly v. Arriba Soft Corp., 336 F.3d 811, 816 (9th Cir.2003). The term "framing" refers to the process by which information from one computer appears to frame and annotate the in-line linked content from another computer. Perfect 10, 416 F.Supp.2d at 833-34.

Google also stores webpage content in its cache.^[3] For each cached webpage, Google's cache contains the text of the webpage as it appeared at the time Google indexed the page, but does not store images from the webpage. Id. at 833. Google may provide a link to a cached webpage in response to a user's search query. However, Google's cache version of the webpage is not automatically updated when the webpage is revised by its owner. So if the webpage owner updates its webpage to remove the HTML instructions for finding an infringing image, a browser communicating directly with the webpage would not be able to access that image. However, Google's cache copy of the webpage would still have the old HTML instructions for the infringing image. Unless the owner of the computer changed the HTML address of the infringing image, or otherwise rendered the image unavailable, a browser accessing Google's cache copy of the website could still access the image where it is stored on the website publisher's computer. In other words, Google's cache copy could provide a user's browser with valid directions to an infringing image even though the updated webpage no longer includes that infringing image.

In addition to its search engine operations, Google generates revenue through a business program called "AdSense." Under this program, the owner of a website can register with Google to become an AdSense "partner." The website owner then places HTML instructions on its webpages that signal Google's server to place advertising on the webpages that is relevant to the webpages' content. Google's computer program selects the advertising automatically by means of an algorithm. AdSense participants agree to share the revenues that flow from such advertising with Google.

[1157] Google also generated revenues through an agreement with Amazon.com that allowed Amazon.com to in-line link to Google's search results. Amazon.com gave its users the impression that Amazon.com was providing search results, but Google communicated the search results directly to Amazon.com's users. Amazon.com routed users' search queries to Google and automatically transmitted Google's responses (i.e., HTML instructions for linking to Google's search results) back to its users.

Perfect 10 markets and sells copyrighted images of nude models. Among other enterprises, it operates a subscription website on the Internet. Subscribers pay a monthly fee to view Perfect 10 images in a "members' area" of the site. Subscribers must use a password to log into the members' area. Google does not include these password-protected images from the members' area in Google's index or database. Perfect 10 has also licensed Fonestarz Media Limited to sell and distribute Perfect 10's reduced-size copyrighted images for download and use on cell phones.

Some website publishers republish Perfect 10's images on the Internet without authorization. Once this occurs, Google's search engine may automatically index the webpages containing these images and provide thumbnail versions of images in response to user inquiries. When a user clicks on the thumbnail image returned by Google's search engine, the user's browser accesses the third-party webpage and in-line links to the full-sized infringing image stored on the website publisher's computer. This image appears, in its original context, on the lower portion of the window on the user's computer screen framed by information from Google's webpage.

Procedural History. In May 2001, Perfect 10 began notifying Google that its thumbnail images and in-line linking to the full-size images infringed Perfect 10's copyright. Perfect 10 continued to send these notices through 2005.

On November 19, 2004, Perfect 10 filed an action against Google that included copyright infringement claims. This was followed by a similar action against Amazon.com on June 29, 2005. On July 1, 2005 and August 24, 2005, Perfect 10 sought a preliminary injunction to prevent Amazon.com and Google, respectively, from "copying, reproducing, distributing, publicly displaying, adapting or otherwise infringing, or contributing to the infringement" of Perfect 10's photographs; linking to websites that provide full-size infringing versions of Perfect 10's photographs; and infringing Perfect 10's username/password combinations.

The district court consolidated the two actions and heard both preliminary injunction motions on November 7, 2005. The district court issued orders granting in part and denying in part the preliminary injunction against Google and denying the preliminary injunction against Amazon.com. Perfect 10 and Google cross-appealed the partial grant and partial denial of the preliminary injunction motion, and Perfect 10 appealed the denial of the preliminary injunction against Amazon.com. On June 15, 2006, the district court temporarily stayed the preliminary injunction.

II

Standard of Review

We review the district court's grant or denial of a preliminary injunction for an abuse of discretion. A & M Records, Inc. v. Napster, Inc., 239 F.3d 1004, 1013 (9th Cir.2001). The district court must support a preliminary injunction with findings of fact, which we review for clear error. Earth Island Inst. v. U.S. Forest Serv., 442 F.3d 1147, 1156 (9th Cir.2006). We review the district court's conclusions of law de novo. Napster, 239 F.3d at 1013.

[1158] Section 502(a) of the Copyright Act authorizes a court to grant injunctive relief "on such terms as it may deem reasonable to prevent or restrain infringement of a copyright." 17 U.S.C. § 502(a). "Preliminary injunctive relief is available to a party who demonstrates either: (1) a combination of probable success on the merits and the possibility of irreparable harm; or (2) that serious questions are raised and the balance of hardships tips in its favor. These two formulations represent two points on a sliding scale in which the required degree of irreparable harm increases as the probability of success decreases." Napster, 239 F.3d at 1013 (internal quotation and citation omitted).

Because Perfect 10 has the burden of showing a likelihood of success on the merits, the district court held that Perfect 10 also had the burden of demonstrating a likelihood of overcoming Google's fair use defense under 17 U.S.C. § 107. Perfect 10, 416 F.Supp.2d at 836-37. This ruling was erroneous. At trial, the defendant in an infringement action bears the burden of proving fair use. See Campbell v. Acuff-Rose Music, Inc., 510 U.S. 569, 590, 114 S.Ct. 1164, 127 L.Ed.2d 500 (1994). Because "the burdens at the preliminary injunction stage track the burdens at trial," once the moving party has carried its burden of showing a likelihood of success on the merits, the burden shifts to the non-moving party to show a likelihood that its affirmative defense will succeed. Gonzales v. O Centro Espirita Beneficente Uniao do Vegetal, 546 U.S. 418, 429, 126 S.Ct. 1211, 163 L.Ed.2d 1017 (2006); see also Abbott Labs. v. Andrx Pharms., Inc., 473 F.3d 1196, 1201 (Fed. Cir.2007) (to defeat a motion for preliminary injunctive relief in a patent infringement case, the non-moving party must establish a likelihood of success in proving its defenses of invalidity or unenforceability); PHG Techs., LLC v. St. John Cos., 469 F.3d 1361, 1365 (Fed.Cir.2006). Accordingly, once Perfect 10 has shown a likelihood of success on the merits, the burden shifts to Google to show a likelihood that its affirmative defenses will succeed.

In addition to its fair use defense, Google also raises an affirmative defense under title II of the Digital Millennium Copyright Act ("DMCA"), 17 U.S.C. § 512. Congress enacted title II of the DMCA "to provide greater certainty to service providers concerning their legal exposure for infringements that may occur in the course of their activities." Ellison v. Robertson, 357 F.3d 1072, 1076 (9th Cir. 2004) (internal quotation omitted). Sections 512(a) through (d) limit liability for (respectively): "(1) transitory digital network communications; (2) system caching; (3) information residing on systems or networks at the direction of users; and (4) information location tools." Id. at 1077. A service provider that qualifies for such protection is not liable for monetary relief and may be subject only to the narrow injunctive relief set forth in section 512(j). 17 U.S.C. § 512(a). If Perfect 10 demonstrates a likelihood of success on the merits, Google must show a likelihood of succeeding in its claim that it qualifies for protection under title II of the DMCA.^[4][1159]

III

Direct Infringement

Perfect 10 claims that Google's search engine program directly infringes two exclusive rights granted to copyright holders: its display rights and its distribution rights.^[5] "Plaintiffs must satisfy two requirements to present a prima facie case of direct infringement: (1) they must show ownership of the allegedly infringed material and (2) they must demonstrate that the alleged infringers violate at least one exclusive right granted to copyright holders under 17 U.S.C. § 106." Napster, 239 F.3d at 1013; see 17 U.S.C. § 501(a). Even if a plaintiff satisfies these two requirements and makes a prima facie case of direct infringement, the defendant may avoid liability if it can establish that its use of the images is a "fair use" as set forth in 17 U.S.C. § 107. See Kelly, 336 F.3d at 817.

Perfect 10's ownership of at least some of the images at issue is not disputed. See Perfect 10, 416 F.Supp.2d at 836.

The district court held that Perfect 10 was likely to prevail in its claim that Google violated Perfect 10's display right with respect to the infringing thumbnails. Id. at 844. However, the district court concluded that Perfect 10 was not likely to prevail on its claim that Google violated either Perfect 10's display or distribution right with respect to its full-size infringing images. Id. at 844-45. We review these rulings for an abuse of discretion. Napster, 239 F.3d at 1013.

A. Display Right

In considering whether Perfect 10 made a prima facie case of violation of its display right, the district court reasoned that a computer owner that stores an image as electronic information and serves that electronic information directly to the user ("i.e., physically sending ones and zeroes over the [I]nternet to the user's browser," Perfect 10, 416 F.Supp.2d at 839) is displaying the electronic information in violation of a copyright holder's exclusive display right. Id. at 843-45; see 17 U.S.C. § 106(5). Conversely, the owner of a computer that does not store and serve the electronic information to a user is not displaying that information, even if such owner in-line links to or frames the electronic information. Perfect 10, 416 F.Supp.2d at 843-45. The district court referred to this test as the "server test." Id. at 838-39.

Applying the server test, the district court concluded that Perfect 10 was likely to succeed in its claim that Google's thumbnails constituted direct infringement but was unlikely to succeed in its claim that Google's in-line linking to full-size infringing images constituted a direct infringement. [1160] Id. at 843-45. As explained below, because this analysis comports with the language of the Copyright Act, we agree with the district court's resolution of both these issues.

We have not previously addressed the question when a computer displays a copyrighted work for purposes of section 106(5). Section 106(5) states that a copyright owner has the exclusive right "to display the copyrighted work publicly." The Copyright Act explains that "display" means "to show a copy of it, either directly or by means of a film, slide, television image, or any other device or process...." 17 U.S.C. § 101. Section 101 defines "copies" as "material objects, other than phonorecords, in which a work is fixed by any method now known or later developed, and from which the work can be perceived, reproduced, or otherwise communicated, either directly or with the aid of a machine or device." Id. Finally, the Copyright Act provides that "[a] work is `fixed' in a tangible medium of expression when its embodiment in a copy or phonorecord, by or under the authority of the author, is sufficiently permanent or stable to permit it to be perceived, reproduced, or otherwise communicated for a period of more than transitory duration." Id.

We must now apply these definitions to the facts of this case. A photographic image is a work that is "`fixed' in a tangible medium of expression," for purposes of the Copyright Act, when embodied (i.e., stored) in a computer's server (or hard disk, or other storage device). The image stored in the computer is the "copy" of the work for purposes of copyright law. See MAI Sys. Corp. v. Peak Computer, Inc., 991 F.2d 511, 517-18 (9th Cir.1993) (a computer makes a "copy" of a software program when it transfers the program from a third party's computer (or other storage device) into its own memory, because the copy of the program recorded in the computer is "fixed" in a manner that is "sufficiently permanent or stable to permit it to be perceived, reproduced, or otherwise communicated for a period of more than transitory duration" (quoting 17 U.S.C. § 101)). The computer owner shows a copy "by means of a ... device or process" when the owner uses the computer to fill the computer screen with the photographic image stored on that computer, or by communicating the stored image electronically to another person's computer. 17 U.S.C. § 101. In sum, based on the plain language of the statute, a person displays a photographic image by using a computer to fill a computer screen with a copy of the photographic image fixed in the computer's memory. There is no dispute that Google's computers store thumbnail versions of Perfect 10's copyrighted images and communicate copies of those thumbnails to Google's users.^[6] Therefore, Perfect 10 has made a prima facie case that Google's communication of its stored thumbnail images directly infringes Perfect 10's display right.

Google does not, however, display a copy of full-size infringing photographic images for purposes of the Copyright Act when Google frames in-line linked images that appear on a user's computer screen. Because Google's computers do not store the photographic images, Google does not have a copy of the images for purposes of the Copyright Act. In other words, Google does not have any "material objects ... in [1161] which a work is fixed ... and from which the work can be perceived, reproduced, or otherwise communicated" and thus cannot communicate a copy. 17 U.S.C. § 101.

Instead of communicating a copy of the image, Google provides HTML instructions that direct a user's browser to a website publisher's computer that stores the full-size photographic image. Providing these HTML instructions is not equivalent to showing a copy. First, the HTML instructions are lines of text, not a photographic image. Second, HTML instructions do not themselves cause infringing images to appear on the user's computer screen. The HTML merely gives the address of the image to the user's browser. The browser then interacts with the computer that stores the infringing image. It is this interaction that causes an infringing image to appear on the user's computer screen. Google may facilitate the user's access to infringing images. However, such assistance raises only contributory liability issues, see Metro-Goldwyn-Mayer Studios, Inc. v. Grokster, Ltd., 545 U.S. 913, 929-30, 125 S.Ct. 2764, 162 L.Ed.2d 781 (2005), Napster, 239 F.3d at 1019, and does not constitute direct infringement of the copyright owner's display rights.

Perfect 10 argues that Google displays a copy of the full-size images by framing the full-size images, which gives the impression that Google is showing the image within a single Google webpage. While in-line linking and framing may cause some computer users to believe they are viewing a single Google webpage, the Copyright Act, unlike the Trademark Act, does not protect a copyright holder against acts that cause consumer confusion. Cf. 15 U.S.C. § 1114(1) (providing that a person who uses a trademark in a manner likely to cause confusion shall be liable in a civil action to the trademark registrant).^[7]

Nor does our ruling that a computer owner does not display a copy of an image when it communicates only the HTML address of the copy erroneously collapse the display right in section 106(5) into the reproduction right set forth in section 106(1). Nothing in the Copyright Act prevents the various rights protected in section 106 from overlapping. Indeed, under some circumstances, more than one right must be infringed in order for an infringement claim to arise. For example, a "Game Genie" device that allowed a player to alter features of a Nintendo computer game did not infringe Nintendo's right to prepare derivative works because the Game Genie did not incorporate any portion of the game itself. See Lewis Galoob Toys, Inc. v. Nintendo of Am., Inc., 964 F.2d 965, 967 (9th Cir.1992). We held that a copyright holder's right to create derivative works is not infringed unless the alleged derivative work "incorporate[s] a protected work in some concrete or permanent `form.'" Id. In other words, in some contexts, the claimant must be able to claim infringement of its reproduction right in order to claim infringement of its right to prepare derivative works.

[1162] Because Google's cache merely stores the text of webpages, our analysis of whether Google's search engine program potentially infringes Perfect 10's display and distribution rights is equally applicable to Google's cache. Perfect 10 is not likely to succeed in showing that a cached webpage that in-line links to full-size infringing images violates such rights. For purposes of this analysis, it is irrelevant whether cache copies direct a user's browser to third-party images that are no longer available on the third party's website, because it is the website publisher's computer, rather than Google's computer, that stores and displays the infringing image.

B. Distribution Right

The district court also concluded that Perfect 10 would not likely prevail on its claim that Google directly infringed Perfect 10's right to distribute its full-size images. Perfect 10, 416 F.Supp.2d at 844-45. The district court reasoned that distribution requires an "actual dissemination" of a copy. Id. at 844. Because Google did not communicate the full-size images to the user's computer, Google did not distribute these images. Id.

Again, the district court's conclusion on this point is consistent with the language of the Copyright Act. Section 106(3) provides that the copyright owner has the exclusive right "to distribute copies or phonorecords of the copyrighted work to the public by sale or other transfer of ownership, or by rental, lease, or lending." 17 U.S.C. § 106(3). As noted, "copies" means "material objects ... in which a work is fixed." 17 U.S.C. § 101. The Supreme Court has indicated that in the electronic context, copies may be distributed electronically. See N.Y. Times Co. v. Tasini, 533 U.S. 483, 498, 121 S.Ct. 2381, 150 L.Ed.2d 500 (2001) (a computer database program distributed copies of newspaper articles stored in its computerized database by selling copies of those articles through its database service). Google's search engine communicates HTML instructions that tell a user's browser where to find full-size images on a website publisher's computer, but Google does not itself distribute copies of the infringing photographs. It is the website publisher's computer that distributes copies of the images by transmitting the photographic image electronically to the user's computer. As in Tasini, the user can then obtain copies by downloading the photo or printing it.

Perfect 10 incorrectly relies on Hotaling v. Church of Jesus Christ of Latter-Day Saints and Napster for the proposition that merely making images "available" violates the copyright owner's distribution right. Hotaling v. Church of Jesus Christ of Latter-Day Saints, 118 F.3d 199 (4th Cir.1997); Napster, 239 F.3d 1004. Hotaling held that the owner of a collection of works who makes them available to the public may be deemed to have distributed copies of the works. Hotaling, 118 F.3d at 203. Similarly, the distribution rights of the plaintiff copyright owners were infringed by Napster users (private individuals with collections of music files stored on their home computers) when they used the Napster software to make their collections available to all other Napster users. Napster, 239 F.3d at 1011-14.

This "deemed distribution" rule does not apply to Google. Unlike the participants in the Napster system or the library in Hotaling, Google does not own a collection of Perfect 10's full-size images and does not communicate these images to the computers of people using Google's search engine. Though Google indexes these images, it does not have a collection of stored full-size images it makes available to the public. Google therefore cannot be deemed to distribute copies of these images under the reasoning of Napster or [1163] Hotaling. Accordingly, the district court correctly concluded that Perfect 10 does not have a likelihood of success in proving that Google violates Perfect 10's distribution rights with respect to full-size images.

C. Fair Use Defense

Because Perfect 10 has succeeded in showing it would prevail in its prima facie case that Google's thumbnail images infringe Perfect 10's display rights, the burden shifts to Google to show that it will likely succeed in establishing an affirmative defense. Google contends that its use of thumbnails is a fair use of the images and therefore does not constitute an infringement of Perfect 10's copyright. See 17 U.S.C. § 107.

The fair use defense permits the use of copyrighted works without the copyright owner's consent under certain situations. The defense encourages and allows the development of new ideas that build on earlier ones, thus providing a necessary counterbalance to the copyright law's goal of protecting creators' work product. "From the infancy of copyright protection, some opportunity for fair use of copyrighted materials has been thought necessary to fulfill copyright's very purpose...." Campbell, 510 U.S. at 575, 114 S.Ct. 1164. "The fair use doctrine thus `permits [and requires] courts to avoid rigid application of the copyright statute when, on occasion, it would stifle the very creativity which that law is designed to foster.'" Id. at 577, 114 S.Ct. 1164 (quoting Stewart v. Abend, 495 U.S. 207, 236, 110 S.Ct. 1750, 109 L.Ed.2d 184 (1990)) (alteration in original).

Congress codified the common law of fair use in 17 U.S.C. § 107, which provides:

Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, including such use by reproduction in copies or phonorecords or by any other means specified by that section, for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research, is not an infringement of copyright. In determining whether the use made of a work in any particular case is a fair use the factors to be considered shall include—

(1) the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes;

(2) the nature of the copyrighted work;

(3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and

(4) the effect of the use upon the potential market for or value of the copyrighted work.

The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors.

17 U.S.C. § 107.

We must be flexible in applying a fair use analysis; it "is not to be simplified with bright-line rules, for the statute, like the doctrine it recognizes, calls for case-by-case analysis.... Nor may the four statutory factors be treated in isolation, one from another. All are to be explored, and the results weighed together, in light of the purposes of copyright." Campbell, 510 U.S. at 577-78, 114 S.Ct. 1164; see also Kelly, 336 F.3d at 817-18. The purpose of copyright law is "[t]o promote the Progress of Science and useful Arts," U.S. CONST. art. I, § 8, cl. 8, and to serve "`the welfare of the public.'" Sony Corp. of Am. v. Universal City Studios, Inc., 464 U.S. 417, 429 n. 10, 104 S.Ct. 774, 78 L.Ed.2d 574 (quoting H.R.Rep. No. 2222, 60th Cong., 2d Sess. 7 (1909)).

[1164] In applying the fair use analysis in this case, we are guided by Kelly v. Arriba Soft Corp., which considered substantially the same use of copyrighted photographic images as is at issue here. See 336 F.3d 811. In Kelly, a photographer brought a direct infringement claim against Arriba, the operator of an Internet search engine. The search engine provided thumbnail versions of the photographer's images in response to search queries. Id. at 815-16. We held that Arriba's use of thumbnail images was a fair use primarily based on the transformative nature of a search engine and its benefit to the public. Id. at 818-22. We also concluded that Arriba's use of the thumbnail images did not harm the photographer's market for his image. Id. at 821-22.

In this case, the district court determined that Google's use of thumbnails was not a fair use and distinguished Kelly. Perfect 10, 416 F.Supp.2d at 845-51. We consider these distinctions in the context of the four-factor fair use analysis.

Purpose and character of the use. The first factor, 17 U.S.C. § 107(1), requires a court to consider "the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes." The central purpose of this inquiry is to determine whether and to what extent the new work is "transformative." Campbell, 510 U.S. at 579, 114 S.Ct. 1164. A work is "transformative" when the new work does not "merely supersede the objects of the original creation" but rather "adds something new, with a further purpose or different character, altering the first with new expression, meaning, or message." Id. (internal quotation and alteration omitted). Conversely, if the new work "supersede[s] the use of the original," the use is likely not a fair use. Harper & Row Publishers, Inc. v. Nation Enters., 471 U.S. 539, 550-51, 105 S.Ct. 2218, 85 L.Ed.2d 588 (1985) (internal quotation omitted) (publishing the "heart" of an unpublished work and thus supplanting the copyright holder's first publication right was not a fair use); see also Wall Data Inc. v. L.A. County Sheriff's Dep't, 447 F.3d 769, 778-82 (9th Cir.2006) (using a copy to save the cost of buying additional copies of a computer program was not a fair use).^[8]

As noted in Campbell, a "transformative work" is one that alters the original work [1165] "with new expression, meaning, or message." Campbell, 510 U.S. at 579, 114 S.Ct. 1164. "A use is considered transformative only where a defendant changes a plaintiff's copyrighted work or uses the plaintiff's copyrighted work in a different context such that the plaintiff's work is transformed into a new creation." Wall Data, 447 F.3d at 778.

Google's use of thumbnails is highly transformative. In Kelly, we concluded that Arriba's use of thumbnails was transformative because "Arriba's use of the images serve[d] a different function than Kelly's use—improving access to information on the [I]nternet versus artistic expression." Kelly, 336 F.3d at 819. Although an image may have been created originally to serve an entertainment, aesthetic, or informative function, a search engine transforms the image into a pointer directing a user to a source of information. Just as a "parody has an obvious claim to transformative value" because "it can provide social benefit, by shedding light on an earlier work, and, in the process, creating a new one," Campbell, 510 U.S. at 579, 114 S.Ct. 1164, a search engine provides social benefit by incorporating an original work into a new work, namely, an electronic reference tool. Indeed, a search engine may be more transformative than a parody because a search engine provides an entirely new use for the original work, while a parody typically has the same entertainment purpose as the original work. See, e.g., id. at 594-96, 114 S.Ct. 1164 (holding that 2 Live Crew's parody of "Oh, Pretty Woman" using the words "hairy woman" or "bald headed woman" was a transformative work, and thus constituted a fair use); Mattel, Inc. v. Walking Mountain Prods., 353 F.3d 792, 796-98, 800-06 (9th Cir.2003) (concluding that photos parodying Barbie by depicting "nude Barbie dolls juxtaposed with vintage kitchen appliances" was a fair use). In other words, a search engine puts images "in a different context" so that they are "transformed into a new creation." Wall Data, 447 F.3d at 778.

The fact that Google incorporates the entire Perfect 10 image into the search engine results does not diminish the transformative nature of Google's use. As the district court correctly noted, Perfect 10, 416 F.Supp.2d at 848-49, we determined in Kelly that even making an exact copy of a work may be transformative so long as the copy serves a different function than the original work, Kelly, 336 F.3d at 818-19. For example, the First Circuit has held that the republication of photos taken for a modeling portfolio in a newspaper was transformative because the photos served to inform, as well as entertain. See Nunez v. Caribbean Int'l News Corp., 235 F.3d 18, 22-23 (1st Cir.2000). In contrast, duplicating a church's religious book for use by a different church was not transformative. See Worldwide Church of God v. Phila. Church of God, Inc., 227 F.3d 1110, 1117 (9th Cir.2000). Nor was a broadcaster's simple retransmission of a radio broadcast over telephone lines transformative, where the original radio shows were given no "new expression, meaning, or message." Infinity Broad. Corp. v. Kirkwood, 150 F.3d 104, 108 (2d Cir.1998). Here, Google uses Perfect 10's images in a new context to serve a different purpose.

The district court nevertheless determined that Google's use of thumbnail images was less transformative than Arriba's use of thumbnails in Kelly because Google's use of thumbnails superseded Perfect 10's right to sell its reduced-size images for use on cell phones. See Perfect 10, 416 F.Supp.2d at 849. The district court stated that "mobile users can download and save the thumbnails displayed by Google Image Search onto their phones," and concluded "to the extent that users may choose to download free images to their [1166] phone rather than purchase [Perfect 10's] reduced-size images, Google's use supersedes [Perfect 10's]." Id.

Additionally, the district court determined that the commercial nature of Google's use weighed against its transformative nature. Id. Although Kelly held that the commercial use of the photographer's images by Arriba's search engine was less exploitative than typical commercial use, and thus weighed only slightly against a finding of fair use, Kelly, 336 F.3d at 818-20, the district court here distinguished Kelly on the ground that some website owners in the AdSense program had infringing Perfect 10 images on their websites, Perfect 10, 416 F.Supp.2d at 846-47. The district court held that because Google's thumbnails "lead users to sites that directly benefit Google's bottom line," the AdSense program increased the commercial nature of Google's use of Perfect 10's images. Id. at 847.

In conducting our case-specific analysis of fair use in light of the purposes of copyright, Campbell, 510 U.S. at 581, 114 S.Ct. 1164, we must weigh Google's superseding and commercial uses of thumbnail images against Google's significant transformative use, as well as the extent to which Google's search engine promotes the purposes of copyright and serves the interests of the public. Although the district court acknowledged the "truism that search engines such as Google Image Search provide great value to the public," Perfect 10, 416 F.Supp.2d at 848-49, the district court did not expressly consider whether this value outweighed the significance of Google's superseding use or the commercial nature of Google's use. Id. at 849. The Supreme Court, however, has directed us to be mindful of the extent to which a use promotes the purposes of copyright and serves the interests of the public. See Campbell, 510 U.S. at 579, 114 S.Ct. 1164; Harper & Row, 471 U.S. at 556-57, 105 S.Ct. 2218; Sony, 464 U.S. at 431-32, 104 S.Ct. 774.

We note that the superseding use in this case is not significant at present: the district court did not find that any downloads for mobile phone use had taken place. See Perfect 10, 416 F.Supp.2d at 849. Moreover, while Google's use of thumbnails to direct users to AdSense partners containing infringing content adds a commercial dimension that did not exist in Kelly, the district court did not determine that this commercial element was significant. See id. at 848-49. The district court stated that Google's AdSense programs as a whole contributed "$630 million, or 46% of total revenues" to Google's bottom line, but noted that this figure did not "break down the much smaller amount attributable to websites that contain infringing content." Id. at 847 & n. 12 (internal quotation omitted).

We conclude that the significantly transformative nature of Google's search engine, particularly in light of its public benefit, outweighs Google's superseding and commercial uses of the thumbnails in this case. In reaching this conclusion, we note the importance of analyzing fair use flexibly in light of new circumstances. Sony, 464 U.S. at 431-32, 104 S.Ct. 774; id. at 448 n. 31, 104 S.Ct. 774 ("`[Section 107] endorses the purpose and general scope of the judicial doctrine of fair use, but there is no disposition to freeze the doctrine in the statute, especially during a period of rapid technological change.'" (quoting H.R.Rep. No. 94-1476, p. 65-66 (1976), U.S.Code Cong. & Admin. News 1976, p. 5680)). We are also mindful of the Supreme Court's direction that "the more transformative the new work, the less will be the significance of other factors, like commercialism, that may weigh against a finding of fair use." Campbell, 510 U.S. at 579, 114 S.Ct. 1164.

[1167] Accordingly, we disagree with the district court's conclusion that because Google's use of the thumbnails could supersede Perfect 10's cell phone download use and because the use was more commercial than Arriba's, this fair use factor weighed "slightly" in favor of Perfect 10. Perfect 10, 416 F.Supp.2d at 849. Instead, we conclude that the transformative nature of Google's use is more significant than any incidental superseding use or the minor commercial aspects of Google's search engine and website. Therefore, this factor weighs heavily in favor of Google.

The nature of the copyrighted work. With respect to the second factor, "the nature of the copyrighted work," 17 U.S.C. § 107(2), our decision in Kelly is directly on point. There we held that the photographer's images were "creative in nature" and thus "closer to the core of intended copyright protection than are more fact-based works." Kelly, 336 F.3d at 820 (internal quotation omitted). However, because the photos appeared on the Internet before Arriba used thumbnail versions in its search engine results, this factor weighed only slightly in favor of the photographer. Id.

Here, the district court found that Perfect 10's images were creative but also previously published. Perfect 10, 416 F.Supp.2d at 850. The right of first publication is "the author's right to control the first public appearance of his expression." Harper & Row, 471 U.S. at 564, 105 S.Ct. 2218. Because this right encompasses "the choices of when, where, and in what form first to publish a work," id., an author exercises and exhausts this one-time right by publishing the work in any medium. See, e.g., Batjac Prods. Inc. v. Good-Times Home Video Corp., 160 F.3d 1223, 1235 (9th Cir.1998) (noting, in the context of the common law right of first publication, that such a right "does not entail multiple first publication rights in every available medium"). Once Perfect 10 has exploited this commercially valuable right of first publication by putting its images on the Internet for paid subscribers, Perfect 10 is no longer entitled to the enhanced protection available for an unpublished work. Accordingly the district court did not err in holding that this factor weighed only slightly in favor of Perfect 10.^[9] See Perfect 10, 416 F.Supp.2d at 849-50.

The amount and substantiality of the portion used. "The third factor asks whether the amount and substantiality of the portion used in relation to the copyrighted work as a whole ... are reasonable in relation to the purpose of the copying." Campbell, 510 U.S. at 586, 114 S.Ct. 1164 (internal quotation omitted); see also 17 U.S.C. § 107(3). In Kelly, we held Arriba's use of the entire photographic image was reasonable in light of the purpose of a search engine. Kelly, 336 F.3d at 821. Specifically, we noted, "[i]t was necessary for Arriba to copy the entire image to allow users to recognize the image and decide whether to pursue more information about the image or the originating [website]. If Arriba only copied part of the image, it would be more difficult to identify it, thereby reducing the usefulness of the visual search engine." Id. Accordingly, we concluded that this factor did not weigh in favor of either [1168] party. Id. Because the same analysis applies to Google's use of Perfect 10's image, the district court did not err in finding that this factor favored neither party.

Effect of use on the market. The fourth factor is "the effect of the use upon the potential market for or value of the copyrighted work." 17 U.S.C. § 107(4). In Kelly, we concluded that Arriba's use of the thumbnail images did not harm the market for the photographer's full-size images. See Kelly, 336 F.3d at 821-22. We reasoned that because thumbnails were not a substitute for the full-sized images, they did not harm the photographer's ability to sell or license his full-sized images. Id. The district court here followed Kelly's reasoning, holding that Google's use of thumbnails did not hurt Perfect 10's market for full-size images. See Perfect 10, 416 F.Supp.2d at 850-51. We agree.

Perfect 10 argues that the district court erred because the likelihood of market harm may be presumed if the intended use of an image is for commercial gain. However, this presumption does not arise when a work is transformative because "market substitution is at least less certain, and market harm may not be so readily inferred." Campbell, 510 U.S. at 591, 114 S.Ct. 1164. As previously discussed, Google's use of thumbnails for search engine purposes is highly transformative, and so market harm cannot be presumed.

Perfect 10 also has a market for reduced-size images, an issue not considered in Kelly. The district court held that "Google's use of thumbnails likely does harm the potential market for the downloading of [Perfect 10's] reduced-size images onto cell phones." Perfect 10, 416 F.Supp.2d at 851 (emphasis omitted). The district court reasoned that persons who can obtain Perfect 10 images free of charge from Google are less likely to pay for a download, and the availability of Google's thumbnail images would harm Perfect 10's market for cell phone downloads. Id. As we discussed above, the district court did not make a finding that Google users have downloaded thumbnail images for cell phone use. This potential harm to Perfect 10's market remains hypothetical. We conclude that this factor favors neither party.

Having undertaken a case-specific analysis of all four factors, we now weigh these factors together "in light of the purposes of copyright." Campbell, 510 U.S. at 578, 114 S.Ct. 1164; see also Kelly, 336 F.3d at 818 ("We must balance[the section 107] factors in light of the objectives of copyright law, rather than view them as definitive or determinative tests."). In this case, Google has put Perfect 10's thumbnail images (along with millions of other thumbnail images) to a use fundamentally different than the use intended by Perfect 10. In doing so, Google has provided a significant benefit to the public. Weighing this significant transformative use against the unproven use of Google's thumbnails for cell phone downloads, and considering the other fair use factors, all in light of the purpose of copyright, we conclude that Google's use of Perfect 10's thumbnails is a fair use. Because the district court here "found facts sufficient to evaluate each of the statutory factors ... [we] need not remand for further factfinding." Harper & Row, 471 U.S. at 560, 105 S.Ct. 2218 (internal quotation omitted). We conclude that Google is likely to succeed in proving its fair use defense and, accordingly, we vacate the preliminary injunction regarding Google's use of thumbnail images.

IV

Secondary Liability for Copyright Infringement

We now turn to the district court's ruling that Google is unlikely to be secondarily [1169] liable for its in-line linking to infringing full-size images under the doctrines of contributory and vicarious infringement.^[10] The district court ruled that Perfect 10 did not have a likelihood of proving success on the merits of either its contributory infringement or vicarious infringement claims with respect to the full-size images. See Perfect 10, 416 F.Supp.2d at 856, 858. In reviewing the district court's conclusions, we are guided by the Supreme Court's recent interpretation of secondary liability, namely: "[o]ne infringes contributorily by intentionally inducing or encouraging direct infringement, and infringes vicariously by profiting from direct infringement while declining to exercise a right to stop or limit it." Grokster, 545 U.S. at 930, 125 S.Ct. 2764 (internal citations omitted).

Direct Infringement by Third Parties. As a threshold matter, before we examine Perfect 10's claims that Google is secondarily liable, Perfect 10 must establish that there has been direct infringement by third parties. See Napster, 239 F.3d at 1013 n. 2 ("Secondary liability for copyright infringement does not exist in the absence of direct infringement by a third party.").

Perfect 10 alleges that third parties directly infringed its images in three ways. First, Perfect 10 claims that third-party websites directly infringed its copyright by reproducing, displaying, and distributing unauthorized copies of Perfect 10's images. Google does not dispute this claim on appeal.

Second, Perfect 10 claims that individual users of Google's search engine directly infringed Perfect 10's copyrights by storing full-size infringing images on their computers. We agree with the district court's conclusion that Perfect 10 failed to provide sufficient evidence to support this claim. See Perfect 10, 416 F.Supp.2d at 852. There is no evidence in the record directly establishing that users of Google's search engine have stored infringing images on their computers, and the district court did not err in declining to infer the existence of such evidence.

Finally, Perfect 10 contends that users who link to infringing websites automatically make "cache" copies of full-size images and thereby directly infringe Perfect 10's reproduction right. The district court rejected this argument, holding that any such reproduction was likely a "fair use." Id. at 852 n. 17. The district court reasoned that "[l]ocal caching by the browsers of individual users is noncommercial, transformative, and no more than necessary to achieve the objectives of decreasing network latency and minimizing unnecessary bandwidth usage (essential to the [I]nternet). It has a minimal impact on the potential market for the original work...." Id. We agree; even assuming such automatic copying could constitute direct infringement, it is a fair use in this context. The copying function performed automatically by a user's computer to assist in accessing the Internet is a transformative use. Moreover, as noted by the district court, a cache copies no more than is necessary to assist the user in Internet use. It is designed to enhance an individual's computer use, not to supersede the copyright holders' exploitation of their works. Such automatic background copying has no more than a minimal effect on Perfect 10's rights, but a considerable public benefit. Because the four fair use factors weigh in favor of concluding that [1170] cache copying constitutes a fair use, Google has established a likelihood of success on this issue. Accordingly, Perfect 10 has not carried its burden of showing that users' cache copies of Perfect 10's full-size images constitute direct infringement.

Therefore, we must assess Perfect 10's arguments that Google is secondarily liable in light of the direct infringement that is undisputed by the parties: third-party websites' reproducing, displaying, and distributing unauthorized copies of Perfect 10's images on the Internet. Id. at 852.

A. Contributory Infringement

In order for Perfect 10 to show it will likely succeed in its contributory liability claim against Google, it must establish that Google's activities meet the definition of contributory liability recently enunciated in Grokster. Within the general rule that "[o]ne infringes contributorily by intentionally inducing or encouraging direct infringement," Grokster, 545 U.S. at 930, 125 S.Ct. 2764, the Court has defined two categories of contributory liability: "Liability under our jurisprudence may be predicated on actively encouraging (or inducing) infringement through specific acts (as the Court's opinion develops) or on distributing a product distributees use to infringe copyrights, if the product is not capable of `substantial' or `commercially significant' noninfringing uses." Id. at 942, 125 S.Ct. 2764 (Ginsburg, J., concurring) (quoting Sony, 464 U.S. at 442, 104 S.Ct. 774); see also id. at 936-37, 125 S.Ct. 2764.

Looking at the second category of liability identified by the Supreme Court (distributing products), Google relies on Sony, 464 U.S. at 442, 104 S.Ct. 774, to argue that it cannot be held liable for contributory infringement because liability does not arise from the mere sale of a product (even with knowledge that consumers would use the product to infringe) if the product is capable of substantial non-infringing use. Google argues that its search engine service is such a product. Assuming the principle enunciated in Sony is applicable to the operation of Google's search engine, then Google cannot be held liable for contributory infringement solely because the design of its search engine facilitates such infringement. Grokster, 545 U.S. at 931-32, 125 S.Ct. 2764 (discussing Sony, 464 U.S. 417, 104 S.Ct. 774, 78 L.Ed.2d 574). Nor can Google be held liable solely because it did not develop technology that would enable its search engine to automatically avoid infringing images. See id. at 939 n. 12, 125 S.Ct. 2764. However, Perfect 10 has not based its claim of infringement on the design of Google's search engine and the Sony rule does not immunize Google from other sources of contributory liability. See id. at 933-34, 125 S.Ct. 2764.

We must next consider whether Google could be held liable under the first category of contributory liability identified by the Supreme Court, that is, the liability that may be imposed for intentionally encouraging infringement through specific acts.^[11] Grokster tells us that contribution to infringement must be intentional for liability to arise. Grokster, 545 U.S. at 930, 125 S.Ct. 2764. However, Grokster also directs us to analyze contributory liability in light of "rules of fault-based liability derived from the common law," id. at 934-35, 125 S.Ct. 2764, and [1171] common law principles establish that intent may be imputed. "Tort law ordinarily imputes to an actor the intention to cause the natural and probable consequences of his conduct." DeVoto v. Pac. Fid. Life Ins. Co., 618 F.2d 1340, 1347 (9th Cir. 1980); RESTATEMENT (SECOND) OF TORTS § 8A cmt. b (1965) ("If the actor knows that the consequences are certain, or substantially certain, to result from his act, and still goes ahead, he is treated by the law as if he had in fact desired to produce the result."). When the Supreme Court imported patent law's "staple article of commerce doctrine" into the copyright context, it also adopted these principles of imputed intent. Grokster, 545 U.S. at 932, 125 S.Ct. 2764 ("The [staple article of commerce] doctrine was devised to identify instances in which it may be presumed from distribution of an article in commerce that the distributor intended the article to be used to infringe another's patent, and so may justly be held liable for that infringement."). Therefore, under Grokster, an actor may be contributorily liable for intentionally encouraging direct infringement if the actor knowingly takes steps that are substantially certain to result in such direct infringement.

Our tests for contributory liability are consistent with the rule set forth in Grokster. We have adopted the general rule set forth in Gershwin Publishing Corp. v. Columbia Artists Management, Inc., namely: "one who, with knowledge of the infringing activity, induces, causes or materially contributes to the infringing conduct of another, may be held liable as a `contributory' infringer," 443 F.2d 1159, 1162 (2d Cir.1971). See Ellison, 357 F.3d at 1076; Napster, 239 F.3d at 1019; Fonovisa, Inc. v. Cherry Auction, Inc., 76 F.3d 259, 264 (9th Cir.1996).

We have further refined this test in the context of cyberspace^[12] to determine when contributory liability can be imposed on a provider of Internet access or services. See Napster, 239 F.3d at 1019-20. In Napster, we considered claims that the operator of an electronic file sharing system was contributorily liable for assisting individual users to swap copyrighted music files stored on their home computers with other users of the system. Napster, 239 F.3d at 1011-13, 1019-22. We stated that "if a computer system operator learns of specific infringing material available on his system and fails to purge such material from the system, the operator knows of and contributes to direct infringement." Id. at 1021. Because Napster knew of the availability of infringing music files, assisted users in accessing such files, and failed to block access to such files, we concluded that Napster materially contributed to infringement. Id. at 1022.

The Napster test for contributory liability was modeled on the influential district court decision in Religious Technology Center v. Netcom On-Line Communication Services, Inc. (Netcom), 907 F.Supp. 1361, 1365-66 (N.D.Cal.1995). See Napster, 239 F.3d at 1021. In Netcom, a disgruntled former Scientology minister posted allegedly infringing copies of Scientological works on an electronic bulletin board service. Netcom, 907 F.Supp. at 1365-66. The messages were stored on the bulletin board operator's computer, then automatically copied onto Netcom's computer, and from there copied onto other computers comprising "a worldwide community" of electronic bulletin board systems. Id. at 1366-67 & n. 4 (internal quotation omitted). Netcom held that if plaintiffs [1172] could prove that Netcom knew or should have known that the minister infringed plaintiffs' copyrights, "Netcom [would] be liable for contributory infringement since its failure to simply cancel [the former minister's] infringing message and thereby stop an infringing copy from being distributed worldwide constitute[d] substantial participation in [the former minister's] public distribution of the message." Id. at 1374.

Although neither Napster nor Netcom expressly required a finding of intent, those cases are consistent with Grokster because both decisions ruled that a service provider's knowing failure to prevent infringing actions could be the basis for imposing contributory liability. Under such circumstances, intent may be imputed. In addition, Napster and Netcom are consistent with the longstanding requirement that an actor's contribution to infringement must be material to warrant the imposition of contributory liability. Gershwin, 443 F.2d at 1162. Both Napster and Netcom acknowledge that services or products that facilitate access to websites throughout the world can significantly magnify the effects of otherwise immaterial infringing activities. See Napster, 239 F.3d at 1022; Netcom, 907 F.Supp. at 1375. The Supreme Court has acknowledged that "[t]he argument for imposing indirect liability" is particularly "powerful" when individuals using the defendant's software could make a huge number of infringing downloads every day. Grokster, 545 U.S. at 929, 125 S.Ct. 2764. Moreover, copyright holders cannot protect their rights in a meaningful way unless they can hold providers of such services or products accountable for their actions pursuant to a test such as that enunciated in Napster. See id. at 929-30, 125 S.Ct. 2764 ("When a widely shared service or product is used to commit infringement, it may be impossible to enforce rights in the protected work effectively against all direct infringers, the only practical alternative being to go against the distributor of the copying device for secondary liability on a theory of contributory or vicarious infringement."). Accordingly, we hold that a computer system operator can be held contributorily liable if it "has actual knowledge that specific infringing material is available using its system," Napster, 239 F.3d at 1022, and can "take simple measures to prevent further damage" to copyrighted works, Netcom, 907 F.Supp. at 1375, yet continues to provide access to infringing works.

Here, the district court held that even assuming Google had actual knowledge of infringing material available on its system, Google did not materially contribute to infringing conduct because it did not undertake any substantial promotional or advertising efforts to encourage visits to infringing websites, nor provide a significant revenue stream to the infringing websites. Perfect 10, 416 F.Supp.2d at 854-56. This analysis is erroneous. There is no dispute that Google substantially assists websites to distribute their infringing copies to a worldwide market and assists a worldwide audience of users to access infringing materials. We cannot discount the effect of such a service on copyright owners, even though Google's assistance is available to all websites, not just infringing ones. Applying our test, Google could be held contributorily liable if it had knowledge that infringing Perfect 10 images were available using its search engine, could take simple measures to prevent further damage to Perfect 10's copyrighted works, and failed to take such steps.

The district court did not resolve the factual disputes over the adequacy of Perfect 10's notices to Google and Google's responses to these notices. Moreover, there are factual disputes over whether there are reasonable and feasible means for Google to refrain from providing access [1173] to infringing images. Therefore, we must remand this claim to the district court for further consideration whether Perfect 10 would likely succeed in establishing that Google was contributorily liable for in-line linking to full-size infringing images under the test enunciated today.^[13]

B. Vicarious Infringement

Perfect 10 also challenges the district court's conclusion that it is not likely to prevail on a theory of vicarious liability against Google. Perfect 10, 416 F.Supp.2d at 856-58. Grokster states that one "infringes vicariously by profiting from direct infringement while declining to exercise a right to stop or limit it." Grokster, 545 U.S. at 930, 125 S.Ct. 2764. As this formulation indicates, to succeed in imposing vicarious liability, a plaintiff must establish that the defendant exercises the requisite control over the direct infringer and that the defendant derives a direct financial benefit from the direct infringement. See id. Grokster further explains the "control" element of the vicarious liability test as the defendant's "right and ability to supervise the direct infringer." Id. at 930 n. 9, 125 S.Ct. 2764. Thus, under Grokster, a defendant exercises control over a direct infringer when he has both a legal right to stop or limit the directly infringing conduct, as well as the practical ability to do so.

We evaluate Perfect 10's arguments that Google is vicariously liable in light of the direct infringement that is undisputed by the parties, namely, the third-party websites' reproduction, display, and distribution of unauthorized copies of Perfect 10's images on the Internet. Perfect 10, 416 F.Supp.2d at 852; see supra Section IV.A. In order to prevail at this preliminary injunction stage, Perfect 10 must demonstrate a likelihood of success in establishing that Google has the right and ability to stop or limit the infringing activities of third party websites. In addition, Perfect 10 must establish a likelihood of proving that Google derives a direct financial benefit from such activities. Perfect 10 has not met this burden.

With respect to the "control" element set forth in Grokster, Perfect 10 has not demonstrated a likelihood of showing that Google has the legal right to stop or limit the direct infringement of third-party websites. See Grokster, 545 U.S. at 930, 125 S.Ct. 2764. Unlike Fonovisa, where by virtue of a "broad contract" with its vendors the defendant swap meet operators had the right to stop the vendors from selling counterfeit recordings on its premises, Fonovisa, 76 F.3d at 263, Perfect 10 has not shown that Google has contracts with third-party websites that empower Google to stop or limit them from reproducing, displaying, and distributing infringing copies of Perfect 10's images on the Internet. Perfect 10 does point to Google's AdSense agreement, which states that Google reserves "the right to monitor and terminate partnerships with entities that violate others' copyright[s]." Perfect 10, 416 F.Supp.2d at 858. However, Google's right to terminate an AdSense partnership does not give Google the right to [1174] stop direct infringement by third-party websites. An infringing third-party website can continue to reproduce, display, and distribute its infringing copies of Perfect 10 images after its participation in the AdSense program has ended.

Nor is Google similarly situated to Napster. Napster users infringed the plaintiffs' reproduction and distribution rights through their use of Napster's proprietary music-file sharing system. Napster, 239 F.3d at 1011-14. There, the infringing conduct was the use of Napster's "service to download and upload copyrighted music." Id. at 1014 (internal quotation omitted). Because Napster had a closed system requiring user registration, and could terminate its users' accounts and block their access to the Napster system, Napster had the right and ability to prevent its users from engaging in the infringing activity of uploading file names and downloading Napster users' music files through the Napster system.^[14] Id. at 1023-24. By contrast, Google cannot stop any of the third-party websites from reproducing, displaying, and distributing unauthorized copies of Perfect 10's images because that infringing conduct takes place on the third-party websites. Google cannot terminate those third-party websites or block their ability to "host and serve infringing full-size images" on the Internet. Perfect 10, 416 F.Supp.2d at 831.

Moreover, the district court found that Google lacks the practical ability to police the third-party websites' infringing conduct. Id. at 857-58. Specifically, the court found that Google's supervisory power is limited because "Google's software lacks the ability to analyze every image on the [I]nternet, compare each image to all the other copyrighted images that exist in the world ... and determine whether a certain image on the web infringes someone's copyright." Id. at 858. The district court also concluded that Perfect 10's suggestions regarding measures Google could implement to prevent its web crawler from indexing infringing websites and to block access to infringing images were not workable. Id. at 858 n. 25. Rather, the suggestions suffered from both "imprecision and overbreadth." Id. We hold that these findings are not clearly erroneous. Without image-recognition technology, Google lacks the practical ability to police the infringing activities of third-party websites. This distinguishes Google from the defendants held liable in Napster and Fonovisa. See Napster, 239 F.3d at 1023-24 (Napster had the ability to identify and police infringing conduct by searching its index for song titles); Fonovisa, 76 F.3d at 262 (swap meet operator had the ability to identify and police infringing activity by patrolling its premises).

Perfect 10 argues that Google could manage its own operations to avoid [1175] indexing websites with infringing content and linking to third-party infringing sites. This is a claim of contributory liability, not vicarious liability. Although "the lines between direct infringement, contributory infringement, and vicarious liability are not clearly drawn," Sony, 464 U.S. at 435 n. 17, 104 S.Ct. 774 (internal quotation omitted), in general, contributory liability is based on the defendant's failure to stop its own actions which facilitate third-party infringement, while vicarious liability is based on the defendant's failure to cause a third party to stop its directly infringing activities. See, e.g., Ellison, 357 F.3d at 1077-78; Fonovisa, 76 F.3d at 261-64. Google's failure to change its operations to avoid assisting websites to distribute their infringing content may constitute contributory liability, see supra Section IV.A. However, this failure is not the same as declining to exercise a right and ability to make third-party websites stop their direct infringement. We reject Perfect 10's efforts to blur this distinction.

Because we conclude that Perfect 10 has not shown a likelihood of establishing Google's right and ability to stop or limit the directly infringing conduct of third-party websites, we agree with the district court's conclusion that Perfect 10 "has not established a likelihood of proving the [control] prong necessary for vicarious liability." Perfect 10, 416 F.Supp.2d at 858.^[15]

C. Digital Millennium Copyright Act

Google claims that it qualifies for the limitations on liability set forth in title II of the DMCA, 17 U.S.C. § 512. In particular, section 512(d) limits the liability of a service provider "for infringement of copyright by reason of the provider referring or linking users to an online location containing infringing material or infringing activity, by using information location tools, including a directory, index, reference, pointer, or hypertext link" if the service provider meets certain criteria. We have held that the limitations on liability contained in 17 U.S.C. § 512 protect secondary infringers as well as direct infringers. Napster, 239 F.3d at 1025.

The parties dispute whether Google meets the specified criteria. Perfect 10 claims that it sent qualifying notices to Google and Google did not act expeditiously to remove the infringing material. Google claims that Perfect 10's notices did not comply with the notice provisions of section 512 and were not adequate to inform Google of the location of the infringing images on the Internet or identify the underlying copyrighted work. Google also claims that it responded to all notices it received by investigating the webpages identified by Perfect 10 and suppressing links to any webpages that Google confirmed were infringing.

Because the district court determined that Perfect 10 was unlikely to succeed on its contributory and vicarious liability claims, it did not reach Google's arguments under section 512. In revisiting the question of Perfect 10's likelihood of success on its contributory infringement claims, the district court should also consider whether Google would likely succeed in showing that it was entitled to the limitations on injunctive relief provided by title II of the DMCA.

V

Amazon.com

Perfect 10 claims that Amazon.com displays and distributes Perfect 10's copyrighted images and is also secondarily [1176] liable for the infringements of third-party websites and Amazon.com users. The district court concluded that Perfect 10 was unlikely to succeed in proving that Amazon.com was a direct infringer, because it merely in-line linked to the thumbnails on Google's servers and to the full-size images on third-party websites.^[16] Perfect 10 v. Amazon, No. 05-4753, consolidated with 04-9484 (C.D.Cal. February 21, 2006) (order denying preliminary injunction). In addition, the district court concluded that Perfect 10's secondary infringement claims against Amazon.com were likely to fail because Amazon.com had no program analogous to AdSense, and thus did not provide any revenues to infringing sites. Id. Finally, the district court determined that Amazon.com's right and ability to control the infringing conduct of third-party websites was substantially less than Google's. Id. Therefore, the district court denied Perfect 10's motion for a preliminary injunction against Amazon.com. Id.

We agree that Perfect 10 has not shown a likelihood that it would prevail on the merits of its claim that Amazon.com directly infringed its images. Amazon.com communicates to its users only the HTML instructions that direct the users' browsers to Google's computers (for thumbnail images) or to a third party's computer (for full-size infringing images). Therefore, Amazon.com does not display or distribute a copy of the thumbnails or full-size images to its users.

We also agree with the district court's conclusion that Amazon.com does not have "the right and ability to supervise the infringing activity" of Google or third parties. The district court did not clearly err in concluding that Amazon.com lacked a direct financial interest in such activities. Therefore, Perfect 10's claim that Amazon.com is vicariously liable for third-party infringement is unlikely to succeed.

However, the district court did not consider whether Amazon.com had "actual knowledge that specific infringing material is available using its system," Napster, 239 F.3d at 1022 (emphasis in original), and could have "take[n] simple measures to prevent further damage" to copyrighted works, Netcom, 907 F.Supp. at 1375, yet continued to provide access to infringing works. Perfect 10 has presented evidence that it notified Amazon.com that it was facilitating its users' access to infringing material. It is disputed whether the notices gave Amazon.com actual knowledge of specific infringing activities available using its system, and whether Amazon.com could have taken reasonable and feasible steps to refrain from providing access to such images, but failed to do so. Nor did the district court consider whether Amazon.com is entitled to limit its liability under title II of the DMCA. On remand, the district court should consider Amazon.com's potential contributory liability, as well as possible limitations on the scope of injunctive relief, in light of our rulings today.

VI

We conclude that Google's fair use defense is likely to succeed at trial, and therefore we reverse the district court's determination that Google's thumbnail versions of Perfect 10's images likely constituted a direct infringement. The district court also erred in its secondary liability [1177] analysis because it failed to consider whether Google and Amazon.com knew of infringing activities yet failed to take reasonable and feasible steps to refrain from providing access to infringing images. Therefore we must also reverse the district court's holding that Perfect 10 was unlikely to succeed on the merits of its secondary liability claims. Due to this error, the district court did not consider whether Google and Amazon.com are entitled to the limitations on liability set forth in title II of the DMCA. The question whether Google and Amazon.com are secondarily liable, and whether they can limit that liability pursuant to title II of the DMCA, raise fact-intensive inquiries, potentially requiring further fact finding, and thus can best be resolved by the district court on remand. We therefore remand this matter to the district court for further proceedings consistent with this decision.

Because the district court will need to reconsider the appropriate scope of injunctive relief after addressing these secondary liability issues, we do not address the parties' arguments regarding the scope of the injunction issued by the district court. For the same reason, we do not address the parties' dispute over whether the district court abused its discretion in determining that Perfect 10 satisfied the irreparable harm element of a preliminary injunction.

Therefore, we reverse the district court's ruling and vacate the preliminary injunction regarding Google's use of thumbnail versions of Perfect 10's images.^[17] We reverse the district court's rejection of the claims that Google and Amazon.com are secondarily liable for infringement of Perfect 10's full-size images. We otherwise affirm the rulings of the district court. We remand this matter for further proceedings consistent with this opinion. Each party shall bear its own costs on appeal. See FED. R. APP. P. 39(a)(4).

AFFIRMED IN PART; REVERSED IN PART; REMANDED.

[1] Google argues that we lack jurisdiction over the preliminary injunction to the extent it enforces unregistered copyrights. Registration is generally a jurisdictional prerequisite to a suit for copyright infringement. See 17 U.S.C. § 411. But section 411 does not limit the remedies a court can grant. Rather, the Copyright Act gives courts broad authority to issue injunctive relief. See 17 U.S.C. § 502(a). Once a court has jurisdiction over an action for copyright infringement under section 411, the court may grant injunctive relief to restrain infringement of any copyright, whether registered or unregistered. See, e.g., Olan Mills, Inc. v. Linn Photo Co., 23 F.3d 1345, 1349 (8th Cir.1994); Pac. & S. Co., Inc. v. Duncan, 744 F.2d 1490, 1499 n. 17 (11th Cir.1984). Because at least some of the Perfect 10 images at issue were registered, the district court did not err in determining that it could issue an order that covers unregistered works. Therefore, we have jurisdiction over the district court's decision and order.

[2] The website publisher may not actually store the photographic images used on its webpages in its own computer, but may provide HTML instructions directing the user's browser to some further computer that stores the image. Because this distinction does not affect our analysis, for convenience, we will assume that the website publisher stores all images used on its webpages in the website publisher's own computer.

[3] Generally, a "cache" is "a computer memory with very short access time used for storage of frequently or recently used instructions or data." United States v. Ziegler, 474 F.3d 1184, 1186 n. 3 (9th Cir.2007) (quoting MERRIAM-WEBSTER'S COLLEGIATE DICTIONARY 171 (11th ed.2003)). There are two types of caches at issue in this case. A user's personal computer has an internal cache that saves copies of webpages and images that the user has recently viewed so that the user can more rapidly revisit these webpages and images. Google's computers also have a cache which serves a variety of purposes. Among other things, Google's cache saves copies of a large number of webpages so that Google's search engine can efficiently organize and index these webpages.

[4] Perfect 10 argues that we are bound by the language and structure of title II of the DMCA in determining Google's liability for copyright infringement. We have noted that the DMCA does not change copyright law; rather, "Congress provided that [the DMCA's] limitations of liability apply if the provider is found to be liable under existing principles of law." Ellison, 357 F.3d at 1077 (emphasis and internal quotation omitted). As a result, "[c]laims against service providers for direct, contributory, or vicarious copyright infringement, therefore, are generally evaluated just as they would be in the non-online world." Id.; see also 17 U.S.C. § 512(l) ("The failure of a service provider's conduct to qualify for limitation of liability under this section shall not bear adversely upon the consideration of a defense by the service provider that the service provider's conduct is not infringing under this title or any other defense."). Therefore, we must consider Google's potential liability under the Copyright Act without reference to title II of the DMCA.

[5] 17 U.S.C. § 106 states, in pertinent part:

Subject to sections 107 through 122, the owner of copyright under this title has the exclusive rights to do and to authorize any of the following:

(1) to reproduce the copyrighted work in copies or phonorecords;

....

(3) to distribute copies or phonorecords of the copyrighted work to the public by sale or other transfer of ownership, or by rental, lease, or lending;

....

(5) in the case of literary, musical, dramatic, and choreographic works, pantomimes, and pictorial, graphic, or sculptural works, including the individual images of a motion picture or other audiovisual work, to display the copyrighted work publicly....

[6] Because Google initiates and controls the storage and communication of these thumbnail images, we do not address whether an entity that merely passively owns and manages an Internet bulletin board or similar system violates a copyright owner's display and distribution rights when the users of the bulletin board or similar system post infringing works. Cf. CoStar Group, Inc. v. LoopNet, Inc., 373 F.3d 544 (4th Cir.2004).

[7] Perfect 10 also argues that Google violates Perfect 10's right to display full-size images because Google's in-line linking meets the Copyright Act's definition of "to perform or display a work `publicly.'" 17 U.S.C. § 101. This phrase means "to transmit or otherwise communicate a performance or display of the work to ... the public, by means of any device or process, whether the members of the public capable of receiving the performance or display receive it in the same place or in separate places and at the same time or at different times." Id. Perfect 10 is mistaken. Google's activities do not meet this definition because Google transmits or communicates only an address which directs a user's browser to the location where a copy of the full-size image is displayed. Google does not communicate a display of the work itself.

[8] We reject at the outset Perfect 10's argument that providing access to infringing websites cannot be deemed transformative and is inherently not fair use. Perfect 10 relies on Video Pipeline, Inc. v. Buena Vista Home Entm't, Inc., 342 F.3d 191 (3d Cir.2003), and Atari Games Corp. v. Nintendo of Am. Inc., 975 F.2d 832, 843 (Fed.Cir.1992). But these cases, in essence, simply apply the general rule that a party claiming fair use must act in a manner generally compatible with principles of good faith and fair dealing. See Harper & Row, 471 U.S. at 562-63, 105 S.Ct. 2218. For this reason, a company whose business is based on providing scenes from copyrighted movies without authorization could not claim that it provided the same public benefit as the search engine in Kelly. See Video Pipeline, 342 F.3d at 198-200. Similarly, a company whose overriding desire to replicate a competitor's computer game led it to obtain a copy of the competitor's source code from the Copyright Office under false pretenses could not claim fair use with respect to its purloined copy. Atari Games, 975 F.2d at 843.

Unlike the alleged infringers in Video Pipeline and Atari Games, who intentionally misappropriated the copyright owners' works for the purpose of commercial exploitation, Google is operating a comprehensive search engine that only incidentally indexes infringing websites. This incidental impact does not amount to an abuse of the good faith and fair dealing underpinnings of the fair use doctrine. Accordingly, we conclude that Google's inclusion of thumbnail images derived from infringing websites in its Internet-wide search engine activities does not preclude Google from raising a fair use defense.

[9] Google contends that Perfect 10's photographic images are less creative and less deserving of protection than the images of the American West in Kelly because Perfect 10 boasts of its un-retouched photos showing the natural beauty of its models. Having reviewed the record, we conclude that the district court's finding that Perfect 10's photographs "consistently reflect professional, skillful, and sometimes tasteful artistry" is not clearly erroneous. Perfect 10, 416 F.Supp.2d at 849 n. 15. We agree with the district court that there is no basis for concluding that photos of the American West are more deserving of protection than photos of nude models. See id.

[10] Because the district court concluded that Perfect 10 was likely to prevail on its direct infringement claim with respect to Google's use of thumbnails, but not with respect to its in-line linking to full-size images, the district court considered Google's potential secondary liability only on the second issue.

[11] Google's activities do not meet the "inducement" test explained in Grokster because Google has not promoted the use of its search engine specifically to infringe copyrights. See Grokster, 545 U.S. at 935-37, 125 S.Ct. 2764. However, the Supreme Court in Grokster did not suggest that a court must find inducement in order to impose contributory liability under common law principles.

[12] "Cyberspace is a popular term for the world of electronic communications over computer networks." Religious Tech. Ctr. v. Netcom On-Line Commc'n Servs., Inc., 907 F.Supp. 1361, 1365 n. 1 (N.D.Cal.1995).

[13] Perfect 10 claims that Google materially contributed to infringement by linking to websites containing unauthorized passwords, which enabled Google users to access Perfect 10's website and make infringing copies of images. However, Perfect 10 points to no evidence that users logging onto the Perfect 10 site with unauthorized passwords infringed Perfect 10's exclusive rights under section 106. In the absence of evidence that Google's actions led to any direct infringement, this argument does not assist Perfect 10 in establishing that it would prevail on the merits of its contributory liability claim. See Napster, 239 F.3d at 1013 n. 2 ("Secondary liability for copyright infringement does not exist in the absence of direct infringement by a third party.").

[14] Napster's system included "Napster's MusicShare software, available free of charge from Napster's Internet site, and Napster's network servers and server-side software." Napster, 239 F.3d at 1011. By downloading Napster's MusicShare software to the user's personal computer, and registering with the Napster system, a user could both upload and download music files. Id. at 1011-13. If the Napster user uploaded a list of music files stored on the user's personal computer to the Napster system, such music files would be automatically available to other Napster users whenever the user was logged on to the Napster system. Id. at 1012. In addition, the Napster user could download music files directly from other users' personal computers. Id. We explained the infringing conduct as "Napster users who upload file names to the [Napster] search index for others to copy violate plaintiffs' distribution rights. Napster users who download files [through the Napster system] containing copyrighted music violate plaintiffs' reproduction rights." Id. at 1014.

[15] Having so concluded, we need not reach Perfect 10's argument that Google received a direct financial benefit.

[16] Amazon.com states that it ended its relationship with Google on April 30, 2006. Perfect 10's action for preliminary injunction against Amazon.com is not moot, however, because Amazon.com has not established "that the allegedly wrongful behavior cannot reasonably be expected to recur." F.T.C. v. Affordable Media, LLC, 179 F.3d 1228, 1238 (9th Cir.1999) (internal quotation omitted).

[17] Because we vacate the injunction, Google's motion for stay of the injunction is moot.

102 U.S.P.Q.2d 1283
2012 Copr.L.Dec. P 30,231
676 F.3d 19

VIACOM INTERNATIONAL, INC., Comedy Partners, Country Music Television, Inc., Paramount Pictures Corporation, Black Entertainment Television, LLC, Plaintiffs–Appellants,
v.
YOUTUBE, INC., YouTube, LLC, Google, Inc., Defendants–Appellees.The Football Association Premier League Limited, on behalf of themselves and all others similarly situated, Bourne Co., Cal IV Entertainment, LLC, Cherry Lane Music Publishing Company, Inc., X–Ray Dog Music, Inc., Fédération Française De Tennis, Murbo Music Publishing, Inc., Stage Three Music (US), Inc., Plaintiffs–Appellants,Robert Tur, d/b/a Los Angeles News Service, The Scottish Premier League Limited, The Music Force Media Group LLC, The Music Force, LLC, Sin–Drome Records, Ltd., on behalf of themselves and all others similarly situated, National Music Publishers' Association, The Rodgers & Hammerstein Organization, Edward B. Marks Music Company, Freddy Bienstock Music Company, d/b/a Bienstock Publishing Company, Alley Music Corporation, Plaintiffs,
v.
YouTube, Inc., YouTube, LLC, Google, Inc., Defendants–Appellees.

Docket Nos. 10–3270–cv

10–3342–cv.

United States Court of Appeals, Second Circuit.

Argued: Oct. 18, 2011. Decided: April 5, 2012.

[676 F.3d 22] Paul M. Smith, Jenner & Block LLP, Washington, DC (William M. Hohengarten, Scott B. Wilkens, Matthew S. Hellman, and Susan J. Kohlmann, Jenner & Block LLP, New York, NY, and Washington, DC; Theodore B. Olson and Matthew D. McGill, Gibson, Dunn & Crutcher LLP, Washington, DC; Stuart J. Baskin, Shearman & Sterling LLP, New York, NY, on the brief), for Plaintiffs–Appellants Viacom International, Inc., et al.

Charles S. Sims, Proskauer Rose LLP, New York, N.Y. (William M. Hart, Noah Siskind Gitterman, and Elizabeth A. Figueira, Proskauer Rose LLP, New York, NY, on the brief), for Plaintiffs–Appellants Football Association Premier League Ltd., et al.; Max W. Berger and John C. Browne, Bernstein Litowitz Berger & Grossmann LLP, New York, NY, on the brief, for Plaintiffs–Appellants Football Association Premier League Ltd., Bourne Co., Murbo Music Publishing, Inc., Cherry Lane Music Publishing Co., Inc., X–Ray Dog Music, Inc., and Fédération Française de Tennis; Louis M. Solomon and Hal S. Shaftel, Cadwalader, Wickersham & Taft, LLP, New York, NY, on the brief, for Plaintiff–Appellant Football Association Premier League Ltd.; Jacqueline C. Charlesworth and Cindy P. Abramson, Morrison & Foerster, New York, NY, and David S. Stellings and Annika K. Martin, Lieff Cabraser Heimann & Bernstein, LLP, New York, NY, on the brief, for Plaintiff–Appellant Stage Three Music (US), Inc., and Plaintiffs–Appellants National Music Publishers' Association, Rodgers & Hammerstein Organization, Edward B. Marks Music Co., Freddy Bienstock Music Co. d/b/a Bienstock Publishing Co., [676 F.3d 23] and Alley Music Corporation; Daniel Girard and Christina Connolly Sharp, Girard Gibbs LLP, San Francisco, CA, David Garrison, Barrett Johnston & Parsley, Nashville, TN, and Kevin Doherty, Burr & Forman LLP, Nashville, TN, on the brief, for Plaintiff–Appellant Cal IV Entertainment LLC; Christopher Lovell and Christopher M. McGrath, Lovell Stewart Halebian LLP, New York, NY, Jeffrey L. Graubart, Pasadena, CA, and Steve D'Onofrio, Washington, DC, for Plaintiffs The Music Force Media Group LLC, The Music Force, LLC, and Sin–Drome Records, Ltd.

Andrew H. Schapiro, Mayer Brown LLP, New York, N.Y. (A. John P. Mancini and Brian M. Willen, Mayer Brown LLP, New York, NY; David H. Kramer, Michael H. Rubin, and Bart E. Volkmer, Wilson Sonsini Goodrich & Rosati, Palo Alto, CA, on the brief), for Defendants–Appellees.Clifford M. Sloan (Christopher G. Clark and Mary E. Rasenberger, on the brief), Skadden, Arps, Slate, Meagher & Flom LLP, New York, NY, and Washington, DC, for amici curiae Advance Publications, Inc., Association of American Publishers, Association of American University Presses, The Associated Press, The Center for the Rule of Law, Gannett Co., Inc., ICBC Broadcast Holdings, Inc., Institute for Policy Innovation, The Ladies Professional Golf Association, The McClatchy Co., The Media Institute, Minority Media & Telecommunications Council, Inc., National Association of Black Owned Broadcasters, The National Football League, Newspaper Association of America, Picture Archive Council of America, Professional Photographers of America, Radio Television Digital News Association, Rosetta Stone Ltd., The E.W. Scripps Co., Sports Rights Owners Coalition, The Washington Post, and Zuffa LLC, in support of Plaintiffs–Appellants.Peter D. DeChiara, Cohen, Weiss & Simon LLP, New York, NY, for amici curiae American Federation of Musicians, American Federation of Television & Radio Artists, Directors Guild of America, Inc., International Alliance of Theatrical Stage Employees, Screen Actors Guild, Inc., and Studio Transportation Drivers, Local 399, International Brotherhood of Teamsters, in support of Plaintiffs–Appellants.Russell J. Frackman, Mitchell Silberberg & Knupp LLP, Los Angeles, CA, for amici curiae Broadcast Music, Inc., American Society of Composers, Authors and Publishers, SESAC, Inc., The Society of Composers and Lyricists, The Association of Independent Music Publishers, Songwriters Guild of America, The Recording Academy, The Nashville Songwriters Association International, American Association of Independent Music, Music Publishers' Association of the United States, Lisa Thomas Music Services, LLC, Garth Brooks, Bruce Hornsby, Boz Scaggs, Sting, Roger Waters, Glenn Frey, Don Henley, Timothy B. Schmit, and Joe Walsh (The Eagles), in support of Plaintiffs–Appellants.Carey R. Ramos (Lynn B. Bayard and Darren W. Johnson, on the brief), Paul, Weiss, Rifkind, Wharton & Garrison LLP, New York, NY, for amici curiae Stuart N. Brotman, Ronald A. Cass, and Raymond T. Nimmer, in support of Plaintiffs–Appellants.Jonathan L. Marcus (Martin F. Hansen, Matthew Berns, Brian D. Ginsberg & Evan R. Cox, on the brief), Covington & Burling LLP, New York, NY, San Francisco, CA, and Washington, DC, for amicus curiae Business Software Alliance, in support of Plaintiffs–Appellants.Robert Penchina, Levine Sullivan Koch & Schulz, L.L.P., New York, NY, for amicus [676 F.3d 24] curiae CBS Corp., in support of Plaintiffs–Appellants.Bruce A. Lehman (Jason D. Koch and Cameron Coffey, on the brief), Washington, DC, for amicus curiae International Intellectual Property Institute, in support of Plaintiffs–Appellants.Bruce E. Boyden, Marquette University Law School, Milwaukee, WI, for amici curiae Intellectual Property Law Professors, in support of Plaintiffs–Appellants.Gregory G. Garre, Latham & Watkins LLP, Washington, DC (Lori Alvino McGill, Latham & Watkins LLP, Washington, DC, Thomas W. Burt, Microsoft Corp., Redmond, WA, and Jacob Schatz, Electronic Arts Inc., Redwood City, CA, on the brief), for amicus curiae Microsoft Corp. & Electronic Arts Inc., in support of Plaintiffs–Appellants.Kelly M. Klaus, Munger, Tolles & Olson LLP, Los Angeles, CA (Susan Cleary, Independent Film & Television Alliance, on the brief) for amicus curiae Motion Picture Association of America, Independent Film & Television Alliance, in support of Plaintiffs–Appellants.Richard B. Kendall (Laura W. Brill and Joshua Y. Karp, on the brief), Kendall Brill & Klieger LLP, Los Angeles, CA, for amici curiae Matthew L. Spitzer, John R. Allison, Robert G. Bone, Hugh C. Hansen, Michael S. Knoll, Reinier H. Kraakman, Alan Schwartz, and Robert E. Scott, in support of Plaintiffs–Appellants.Andrew M. Riddles, Crowell & Moring LLP, New York, N.Y. (Michael J. Songer, Crowell & Moring LLP, Washington, DC, and Daniel J. Popeo and Cory L. Andrews, Washington Legal Foundation, Washington, DC, on the brief), for amicus curiae Washington Legal Foundation, in support of Plaintiffs–Appellants.Ron Lazebnik, Lincoln Square Legal Services, Inc., New York, NY, for amici curiae Anaheim Ballet, Michael Moore, Khan Academy Inc., Adam Bahner, Michael Bassik, Dane Boedigheimer, Matthew Brown, Michael Buckley, Shay Butler, Charles Como, Iman Crosson, Philip De Vellis, Rawn Erickson, Hank Green, John Green, Kassem Gharaibeh, William Louis Hyde, Kevin Nalty, Allison Speed, Charles Todd, Charles Trippy, and Barnett Zitron, in support of Defendants–Appellees.Seth D. Greenstein, Constantine Cannon LLP, Washington, DC, for amicus curiae Professor Michael Carrier, in support of Defendants–Appellees.Jonathan Band, Washington, DC (Markham C. Erickson, Holch & Erickson LLP, Washington, DC, and Matthew Schruers, Computer & Communications Industry Association, Washington, DC, on the brief), for amici curiae Computer & Communications Industry Association, and Netcoalition, in support of Defendants–Appellees.Michael Barclay, Menlo Park, CA; Deborah R. Gerhardt, UNC School of Law, Chapel Hill, NC, for amicus curiae Consumer Electronics Association, in support of Defendants–Appellees.Andrew P. Bridges, Winston & Strawn LLP, San Francisco, CA, for amici curiae eBay Inc., Facebook, Inc., IAC/Interactivecorp., and Yahoo! Inc., in support of Defendants–Appellees.Corynne M. McSherry (Abigail Phillips, on the brief), Electronic Frontier Foundation, San Francisco, CA, for amici curiae Electronic Frontier Foundation, Center for Democracy & Technology, International Federation of Library Associations & Institutions, American Library Association, Association of College & Research Libraries, and Association of Research Libraries, in support of Defendants–Appellees.

[676 F.3d 25] David T. Goldberg (Sean H. Donahue, on the brief), Donahue & Goldberg, LLP, New York, NY, and Washington, DC, for amici curiae Human Rights Watch, Freedom House, Reporters Without Borders, and Access, in support of Defendants–Appellees.Rebecca S. Engrav, Perkins Coie LLP, Seattle, WA, for amici curiae Intellectual Property and Internet Law Professors, in support of Defendants–Appellees.Gregory P. Gulia (Vanessa C. Hew and R. Terry Parker, on the brief), Duane Morris LLP, New York, NY, for amicus curiae MP3Tunes, Inc., in support of Defendants–Appellees.Jennifer M. Urban, Samuelson Law, Technology & Public Policy Clinic, University of California, Berkeley School of Law, Berkeley, CA, for amici curiae National Alliance for Media Art and Culture and The Alliance for Community Media, in support of Defendants–Appellees.Anthony P. Schoenberg (Stephanie P. Skaff, Deepak Gupta, and David K. Ismay, on the brief), Farella Braun & Martel LLP, San Francisco, CA, for amici curiae National Consumers League, Consumers Union of United States, Inc., Consumer Action, and United States Student Association, in support of Defendants–Appellees.Joseph C. Gratz (Michael H. Page and Ragesh K. Tangri, on the brief), Durie Tangri LLP, San Francisco, CA, for amici curiae National Venture Capital Association, in support of Defendants–Appellees.Benjamin J. Kallos, New York, N.Y. (Sherwin Siy and Michael Weinberg, Public Knowledge, Washington, DC, on the brief), for amicus curiae Public Knowledge, in support of Defendants–Appellees.Patrick J. Coyne, Finnegan Henderson Farabow Garrett & Dunner, LLP, Washington, DC (David W. Hill, American Intellectual Property Law Association, Arlington, VA, on the brief), for amicus curiae American Intellectual Property Law Association, in support of neither party.Jeremy H. Stern, Stern Digital Strategies, Manhattan Beach, CA (Partha P. Chattoraj, Markowitz & Chattoraj LLP, New York, NY, on the brief), for amicus curiae Audible Magic Corp., in support of neither party.Stephen M. Wurzburg, Pillsbury Winthrop Shaw Pittman LLP, Palo Alto, CA, for amicus curiae Vobile, Inc., in support of neither party.

Before: CABRANES and LIVINGSTON, Circuit Judges.^[*]

JOSÉ A. CABRANES, Circuit Judge:

This appeal requires us to clarify the contours of the “safe harbor” provision of the Digital Millennium Copyright Act (DMCA) that limits the liability of online service providers for copyright infringement that occurs “by reason of the storage at the direction of a user of material that resides on a system or network controlled or operated by or for the service provider.” 17 U.S.C. § 512(c).^[1]

The plaintiffs-appellants in these related actions—Viacom International, Inc. (“Viacom”), The Football Association Premier League Ltd. (“Premier League”), and various film studios, television networks, music publishers, and sports leagues (jointly, [676 F.3d 26] the “plaintiffs”)^[2] —appeal from an August 10, 2010 judgment of the United States District Court for the Southern District of New York (Louis L. Stanton, Judge), which granted summary judgment to defendants-appellees YouTube, Inc., YouTube, LLC, and Google Inc. (jointly, “YouTube” or the “defendants”). The plaintiffs alleged direct and secondary copyright infringement based on the public performance, display, and reproduction of approximately 79,000 audiovisual “clips” that appeared on the YouTube website between 2005 and 2008. They demanded, inter alia, statutory damages pursuant to 17 U.S.C. § 504(c) or, in the alternative, actual damages from the alleged infringement, as well as declaratory and injunctive relief.^[3]

In a June 23, 2010 Opinion and Order (the “June 23 Opinion”), the District Court held that the defendants were entitled to DMCA safe harbor protection primarily because they had insufficient notice of the particular infringements in suit. Viacom Int'l, Inc. v. YouTube, Inc., 718 F.Supp.2d 514, 529 (S.D.N.Y.2010). In construing the statutory safe harbor, the District Court concluded that the “actual knowledge” or “aware[ness] of facts or circumstances” that would disqualify an online service provider from safe harbor protection under § 512(c)(1)(A) refer to “knowledge of specific and identifiable infringements.” Id. at 523. The District Court further held that item-specific knowledge of infringing activity is required for a service provider to have the “right and ability to control” infringing activity under § 512(c)(1)(B). Id. at 527. Finally, the District Court held that the replication, transmittal, and display of videos on YouTube constituted activity “by reason of the storage at the direction of a user” within the meaning of § 512(c)(1). Id. at 526–27.

These related cases present a series of significant questions of statutory construction. We conclude that the District Court correctly held that the § 512(c) safe harbor requires knowledge or awareness of specific infringing activity, but we vacate the order granting summary judgment because a reasonable jury could find that YouTube had actual knowledge or awareness of specific infringing activity on its website. We further hold that the District Court erred by interpreting the “right and ability to control” provision to require “item-specific” knowledge. Finally, we affirm the District Court's holding that three of the challenged YouTube software functions fall within the safe harbor for infringement that occurs “by reason of” user storage; we remand for further fact-finding with respect to a fourth software function.

BACKGROUND

A. The DMCA Safe Harbors

“The DMCA was enacted in 1998 to implement the World Intellectual Property Organization Copyright Treaty,” Universal City Studios, Inc. v. Corley, 273 F.3d 429, 440 (2d Cir.2001), and to update domestic copyright law for the digital age, [676 F.3d 27] see Ellison v. Robertson, 357 F.3d 1072, 1076 (9th Cir.2004). Title II of the DMCA, separately titled the “Online Copyright Infringement Liability Limitation Act” (OCILLA), was designed to “clarif[y] the liability faced by service providers who transmit potentially infringing material over their networks.” S.Rep. No. 105–190 at 2 (1998). But “[r]ather than embarking upon a wholesale clarification” of various copyright doctrines, Congress elected “to leave current law in its evolving state and, instead, to create a series of ‘safe harbors[ ]’ for certain common activities of service providers.” Id. at 19. To that end, OCILLA established a series of four “safe harbors” that allow qualifying service providers to limit their liability for claims of copyright infringement based on (a) “transitory digital network communications,” (b) “system caching,” (c) “information residing on systems or networks at [the] direction of users,” and (d) “information location tools.” 17 U.S.C. § 512(a)-(d).

To qualify for protection under any of the safe harbors, a party must meet a set of threshold criteria. First, the party must in fact be a “service provider,” defined, in pertinent part, as “a provider of online services or network access, or the operator of facilities therefor.” 17 U.S.C. § 512(k)(1)(B). A party that qualifies as a service provider must also satisfy certain “conditions of eligibility,” including the adoption and reasonable implementation of a “repeat infringer” policy that “provides for the termination in appropriate circumstances of subscribers and account holders of the service provider's system or network.” Id. § 512(i)(1)(A). In addition, a qualifying service provider must accommodate “standard technical measures” that are “used by copyright owners to identify or protect copyrighted works.” Id. § 512(i)(1)(B), (i)(2).

Beyond the threshold criteria, a service provider must satisfy the requirements of a particular safe harbor. In this case, the safe harbor at issue is § 512(c), which covers infringement claims that arise “by reason of the storage at the direction of a user of material that resides on a system or network controlled or operated by or for the service provider.” Id. § 512(c)(1). The § 512(c) safe harbor will apply only if the service provider:

(A) (i) does not have actual knowledge that the material or an activity using the material on the system or network is infringing;

(ii) in the absence of such actual knowledge, is not aware of facts or circumstances from which infringing activity is apparent; or

(iii) upon obtaining such knowledge or awareness, acts expeditiously to remove, or disable access to, the material;

(B) does not receive a financial benefit directly attributable to the infringing activity, in a case in which the service provider has the right and ability to control such activity; and

(C) upon notification of claimed infringement as described in paragraph (3), responds expeditiously to remove, or disable access to, the material that is claimed to be infringing or to be the subject of infringing activity.

Id. § 512(c)(1)(A)-(C). Section 512(c) also sets forth a detailed notification scheme that requires service providers to “designate[ ] an agent to receive notifications of claimed infringement,” id. § 512(c)(2), and specifies the components of a proper notification, commonly known as a “takedown notice,” to that agent, see id. § 512(c)(3). Thus, actual knowledge of infringing material, awareness of facts or circumstances that make infringing activity apparent, or [676 F.3d 28] receipt of a takedown notice will each trigger an obligation to expeditiously remove the infringing material.

With the statutory context in mind, we now turn to the facts of this case.

B. Factual Background

YouTube was founded in February 2005 by Chad Hurley (“Hurley”), Steve Chen (“Chen”), and Jawed Karim (“Karim”), three former employees of the internet company Paypal. When YouTube announced the “official launch” of the website in December 2005, a press release described YouTube as a “consumer media company” that “allows people to watch, upload, and share personal video clips at www. You Tube. com.” Under the slogan “Broadcast yourself,” YouTube achieved rapid prominence and profitability, eclipsing competitors such as Google Video and Yahoo Video by wide margins. In November 2006, Google acquired YouTube in a stock-for-stock transaction valued at $1.65 billion. By March 2010, at the time of summary judgment briefing in this litigation, site traffic on YouTube had soared to more than 1 billion daily video views, with more than 24 hours of new video uploaded to the site every minute.

The basic function of the YouTube website permits users to “upload” and view video clips free of charge. Before uploading a video to YouTube, a user must register and create an account with the website. The registration process requires the user to accept YouTube's Terms of Use agreement, which provides, inter alia, that the user “will not submit material that is copyrighted ... unless [he is] the owner of such rights or ha[s] permission from their rightful owner to post the material and to grant YouTube all of the license rights granted herein.” When the registration process is complete, the user can sign in to his account, select a video to upload from the user's personal computer, mobile phone, or other device, and instruct the YouTube system to upload the video by clicking on a virtual upload “button.”

Uploading a video to the YouTube website triggers a series of automated software functions. During the upload process, YouTube makes one or more exact copies of the video in its original file format. YouTube also makes one or more additional copies of the video in “Flash” format,^[4] a process known as “transcoding.” The transcoding process ensures that YouTube videos are available for viewing by most users at their request. The YouTube system allows users to gain access to video content by “streaming” the video to the user's computer in response to a playback request. YouTube uses a computer algorithm to identify clips that are “related” to a video the user watches and display links to the “related” clips.

C. Procedural History

Plaintiff Viacom, an American media conglomerate, and various Viacom affiliates filed suit against YouTube on March 13, 2007, alleging direct and secondary copyright infringement^[5] based on the public performance, display, and reproduction of their audiovisual works on the YouTube website. Plaintiff Premier League, an English soccer league, and Plaintiff Bourne Co. filed a putative class action against [676 F.3d 29] YouTube on May 4, 2007, alleging direct and secondary copyright infringement on behalf of all copyright owners whose material was copied, stored, displayed, or performed on YouTube without authorization. Specifically at issue were some 63,497 video clips identified by Viacom, as well as 13,500 additional clips (jointly, the “clips-in-suit”) identified by the putative class plaintiffs.

The plaintiffs in both actions principally demanded statutory damages pursuant to 17 U.S.C. § 504(c) or, in the alternative, actual damages plus the defendants' profits from the alleged infringement, as well as declaratory and injunctive relief.^[6] Judge Stanton, to whom the Viacom action was assigned, accepted the Premier League class action as related. At the close of discovery, the parties in both actions cross-moved for partial summary judgment with respect to the applicability of the DMCA safe harbor defense.^[7]

In the dual-captioned June 23 Opinion, the District Court denied the plaintiffs' motions and granted summary judgment to the defendants, finding that YouTube qualified for DMCA safe harbor protection with respect to all claims of direct and secondary copyright infringement. Viacom Int'l, 718 F.Supp.2d at 529. The District Court prefaced its analysis of the DMCA safe harbor by holding that, based on the plaintiffs' summary judgment submissions, “a jury could find that the defendants not only were generally aware of, but welcomed, copyright-infringing material being placed on their website.” Id. at 518. However, the District Court also noted that the defendants had properly designated an agent pursuant to § 512(c)(2), and “when they received specific notice that a particular item infringed a copyright, they swiftly removed it.” Id. at 519. Accordingly, the District Court identified the crux of the inquiry with respect to YouTube's copyright liability as follows:

[T]he critical question is whether the statutory phrases “actual knowledge that the material or an activity using the material on the system or network is infringing,” and “facts or circumstances from which infringing activity is apparent” in § 512(c)(1)(A)(i) and (ii) mean a general awareness that there are infringements (here, claimed to be widespread and common), or rather mean actual or constructive knowledge of specific and identifiable infringements of individual items.

Id. After quoting at length from the legislative history of the DMCA, the District Court held that “the phrases ‘actual knowledge that the material or an activity’ is infringing, and ‘facts or circumstances' indicating infringing activity, describe knowledge of specific and identifiable infringements of particular individual items.” Id. at 523. “Mere knowledge of [the] prevalence of such activity in general,” the District Court concluded, “is not enough.” Id.

In a final section labeled “Other Points,” the District Court rejected two additional claims. First, it rejected the plaintiffs' argument that the replication, transmittal and display of YouTube videos are functions that fall outside the protection § 512(c)(1) affords for “infringement of copyright by reason of ... storage at the direction of the user.” Id. at 526–27. Second, it rejected the plaintiffs' argument [676 F.3d 30] that YouTube was ineligible for safe harbor protection under the control provision, holding that the “right and ability to control” infringing activity under § 512(c)(1)(B) requires “item-specific” knowledge thereof, because “the provider must know of the particular case before he can control it.” Id. at 527.

Following the June 23 Opinion, final judgment in favor of YouTube was entered on August 10, 2010. These appeals followed.

DISCUSSION

We review an order granting summary judgment de novo, drawing all factual inferences in favor of the non-moving party. See, e.g., Paneccasio v. Unisource Worldwide, Inc., 532 F.3d 101, 107 (2d Cir.2008). “Summary judgment is proper only when, construing the evidence in the light most favorable to the non-movant, ‘there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law.’ ” Doninger v. Niehoff, 642 F.3d 334, 344 (2d Cir.2011) (quoting Fed.R.Civ.P. 56(a)).

A. Actual and “Red Flag” Knowledge: § 512(c)(1)(A)

 The first and most important question on appeal is whether the DMCA safe harbor at issue requires “actual knowledge” or “aware[ness]” of facts or circumstances indicating “specific and identifiable infringements,” Viacom, 718 F.Supp.2d at 523. We consider first the scope of the statutory provision and then its application to the record in this case.

1. The Specificity Requirement

“As in all statutory construction cases, we begin with the language of the statute,” Barnhart v. Sigmon Coal Co., 534 U.S. 438, 450, 122 S.Ct. 941, 151 L.Ed.2d 908 (2002). Under § 512(c)(1)(A), safe harbor protection is available only if the service provider:

(i) does not have actual knowledge that the material or an activity using the material on the system or network is infringing;

(ii) in the absence of such actual knowledge, is not aware of facts or circumstances from which infringing activity is apparent; or

(iii) upon obtaining such knowledge or awareness, acts expeditiously to remove, or disable access to, the material....

17 U.S.C. § 512(c)(1)(A). As previously noted, the District Court held that the statutory phrases “actual knowledge that the material ... is infringing” and “facts or circumstances from which infringing activity is apparent” refer to “knowledge of specific and identifiable infringements.” Viacom, 718 F.Supp.2d at 523. For the reasons that follow, we substantially affirm that holding.

Although the parties marshal a battery of other arguments on appeal, it is the text of the statute that compels our conclusion. In particular, we are persuaded that the basic operation of § 512(c) requires knowledge or awareness of specific infringing activity. Under § 512(c)(1)(A), knowledge or awareness alone does not disqualify the service provider; rather, the provider that gains knowledge or awareness of infringing activity retains safe-harbor protection if it “acts expeditiously to remove, or disable access to, the material.” 17 U.S.C. § 512(c)(1)(A)(iii). Thus, the nature of the removal obligation itself contemplates knowledge or awareness of specific infringing material, because expeditious removal is possible only if the service provider knows with particularity which items to remove. Indeed, to require expeditious removal in the absence of specific knowledge [676 F.3d 31] or awareness would be to mandate an amorphous obligation to “take commercially reasonable steps” in response to a generalized awareness of infringement. Viacom Br. 33. Such a view cannot be reconciled with the language of the statute, which requires “expeditious[ ]” action to remove or disable “ the material ” at issue. 17 U.S.C. § 512(c)(1)(A)(iii) (emphasis added).

On appeal, the plaintiffs dispute this conclusion by drawing our attention to § 512(c)(1)(A)(ii), the so-called “red flag” knowledge provision. See id. § 512(c)(1)(A)(ii) (limiting liability where, “in the absence of such actual knowledge, [the service provider] is not aware of facts or circumstances from which infringing activity is apparent”). In their view, the use of the phrase “facts or circumstances” demonstrates that Congress did not intend to limit the red flag provision to a particular type of knowledge. The plaintiffs contend that requiring awareness of specific infringements in order to establish “aware[ness] of facts or circumstances from which infringing activity is apparent,” 17 U.S.C. § 512(c)(1)(A)(ii), renders the red flag provision superfluous, because that provision would be satisfied only when the “actual knowledge” provision is also satisfied. For that reason, the plaintiffs urge the Court to hold that the red flag provision “requires less specificity” than the actual knowledge provision. Pls.' Supp. Br. 1.

This argument misconstrues the relationship between “actual” knowledge and “red flag” knowledge. It is true that “we are required to ‘disfavor interpretations of statutes that render language superfluous.’ ” Conn. ex rel. Blumenthal v. U.S. Dep't of the Interior, 228 F.3d 82, 88 (2d Cir.2000) (quoting Conn. Nat'l Bank v. Germain, 503 U.S. 249, 253, 112 S.Ct. 1146, 117 L.Ed.2d 391 (1992)). But contrary to the plaintiffs' assertions, construing § 512(c)(1)(A) to require actual knowledge or awareness of specific instances of infringement does not render the red flag provision superfluous. The phrase “actual knowledge,” which appears in § 512(c)(1)(A)(i), is frequently used to denote subjective belief. See, e.g., United States v. Quinones, 635 F.3d 590, 602 (2d Cir.2011) (“[T]he belief held by the defendant need not be reasonable in order for it to defeat ... actual knowledge.”). By contrast, courts often invoke the language of “facts or circumstances,” which appears in § 512(c)(1)(A)(ii), in discussing an objective reasonableness standard. See, e.g., Maxwell v. City of New York, 380 F.3d 106, 108 (2d Cir.2004) (“Police officers' application of force is excessive ... if it is objectively unreasonable in light of the facts and circumstances confronting them, without regard to their underlying intent or motivation.” (internal quotation marks omitted)).

The difference between actual and red flag knowledge is thus not between specific and generalized knowledge, but instead between a subjective and an objective standard. In other words, the actual knowledge provision turns on whether the provider actually or “subjectively” knew of specific infringement, while the red flag provision turns on whether the provider was subjectively aware of facts that would have made the specific infringement “objectively” obvious to a reasonable person. The red flag provision, because it incorporates an objective standard, is not swallowed up by the actual knowledge provision under our construction of the § 512(c) safe harbor. Both provisions do independent work, and both apply only to specific instances of infringement.

The limited body of case law interpreting the knowledge provisions of the § 512(c) safe harbor comports with our view of the specificity requirement. Most [676 F.3d 32] recently, a panel of the Ninth Circuit addressed the scope of § 512(c) in UMG Recordings, Inc. v. Shelter Capital Partners LLC, 667 F.3d 1022 (9th Cir.2011), a copyright infringement case against Veoh Networks, a video-hosting service similar to YouTube.^[8] As in this case, various music publishers brought suit against the service provider, claiming direct and secondary copyright infringement based on the presence of unauthorized content on the website, and the website operator sought refuge in the § 512(c) safe harbor. The Court of Appeals affirmed the district court's determination on summary judgment that the website operator was entitled to safe harbor protection. With respect to the actual knowledge provision, the panel declined to “adopt[ ] a broad conception of the knowledge requirement,” id. at 1038, holding instead that the safe harbor “[r]equir [es] specific knowledge of particular infringing activity,” id. at 1037. The Court of Appeals “reach[ed] the same conclusion” with respect to the red flag provision, noting that “[w]e do not place the burden of determining whether [materials] are actually illegal on a service provider.” Id. at 1038 (alterations in original) (quoting Perfect 10, Inc. v. CCBill LLC, 488 F.3d 1102, 1114 (9th Cir.2007)).

Although Shelter Capital contains the most explicit discussion of the § 512(c) knowledge provisions, other cases are generally in accord. See, e.g., Capitol Records, Inc. v. MP3tunes, LLC, 821 F.Supp.2d 627, 635, 2011 WL 5104616, at *14 (S.D.N.Y. Oct. 25, 2011) (“Undoubtedly, MP3tunes is aware that some level of infringement occurs. But, there is no genuine dispute that MP3tunes did not have specific ‘red flag’ knowledge with respect to any particular link....”); UMG Recordings, Inc. v. Veoh Networks, Inc., 665 F.Supp.2d 1099, 1108 (C.D.Cal.2009) (“ UMG II ”) (“[I]f investigation of ‘facts and circumstances' is required to identify material as infringing, then those facts and circumstances are not ‘red flags.’ ”). While we decline to adopt the reasoning of those decisions in toto, we note that no court has embraced the contrary proposition—urged by the plaintiffs—that the red flag provision “requires less specificity” than the actual knowledge provision.

Based on the text of § 512(c)(1)(A), as well as the limited case law on point, we affirm the District Court's holding that actual knowledge or awareness of facts or circumstances that indicate specific and identifiable instances of infringement will disqualify a service provider from the safe harbor.

2. The Grant of Summary Judgment

The corollary question on appeal is whether, under the foregoing construction of § 512(c)(1)(A), the District Court erred in granting summary judgment to YouTube on the record presented. For the reasons that follow, we hold that although the District Court correctly interpreted § 512(c)(1)(A), summary judgment for the defendants was premature.

i. Specific Knowledge or Awareness

The plaintiffs argue that, even under the District Court's construction of the safe harbor, the record raises material issues of fact regarding YouTube's actual knowledge or “red flag” awareness of specific instances of infringement. To that end, the plaintiffs draw our attention to various estimates regarding the percentage of infringing content on the YouTube website. For example, Viacom cites evidence [676 F.3d 33] that YouTube employees conducted website surveys and estimated that 75–80% of all YouTube streams contained copyrighted material. The class plaintiffs similarly claim that Credit Suisse, acting as financial advisor to Google, estimated that more than 60% of YouTube's content was “premium” copyrighted content—and that only 10% of the premium content was authorized. These approximations suggest that the defendants were conscious that significant quantities of material on the YouTube website were infringing. See Viacom Int'l, 718 F.Supp.2d at 518 (“[A] jury could find that the defendants not only were generally aware of, but welcomed, copyright-infringing material being placed on their website.”). But such estimates are insufficient, standing alone, to create a triable issue of fact as to whether YouTube actually knew, or was aware of facts or circumstances that would indicate, the existence of particular instances of infringement.

Beyond the survey results, the plaintiffs rely upon internal YouTube communications that do refer to particular clips or groups of clips. The class plaintiffs argue that YouTube was aware of specific infringing material because, inter alia, YouTube attempted to search for specific Premier League videos on the site in order to gauge their “value based on video usage.” In particular, the class plaintiffs cite a February 7, 2007 e-mail from Patrick Walker, director of video partnerships for Google and YouTube, requesting that his colleagues calculate the number of daily searches for the terms “soccer,” “football,” and “Premier League” in preparation for a bid on the global rights to Premier League content. On another occasion, Walker requested that any “clearly infringing, official broadcast footage” from a list of top Premier League clubs—including Liverpool Football Club, Chelsea Football Club, Manchester United Football Club, and Arsenal Football Club—be taken down in advance of a meeting with the heads of “several major sports teams and leagues.” YouTube ultimately decided not to make a bid for the Premier League rights—but the infringing content allegedly remained on the website.

The record in the Viacom action includes additional examples. For instance, YouTube founder Jawed Karim prepared a report in March 2006 which stated that, “[a]s of today[,] episodes and clips of the following well-known shows can still be found [on YouTube]: Family Guy, South Park, MTV Cribs, Daily Show, Reno 911, [and] Dave Chapelle [sic].” Karim further opined that, “although YouTube is not legally required to monitor content ... and complies with DMCA takedown requests, we would benefit from preemptively removing content that is blatantly illegal and likely to attract criticism.” He also noted that “a more thorough analysis” of the issue would be required. At least some of the TV shows to which Karim referred are owned by Viacom. A reasonable juror could conclude from the March 2006 report that Karim knew of the presence of Viacom-owned material on YouTube, since he presumably located specific clips of the shows in question before he could announce that YouTube hosted the content “[a]s of today.” A reasonable juror could also conclude that Karim believed the clips he located to be infringing (since he refers to them as “blatantly illegal”), and that YouTube did not remove the content from the website until conducting “a more thorough analysis,” thus exposing the company to liability in the interim.

Furthermore, in a July 4, 2005 e-mail exchange, YouTube founder Chad Hurley sent an e-mail to his co-founders with the subject line “budlight commercials,” and stated, “we need to reject these too.” Steve Chen responded, “can we please [676 F.3d 34] leave these in a bit longer? another week or two can't hurt.” Karim also replied, indicating that he “added back in all 28 bud videos.” Similarly, in an August 9, 2005 e-mail exchange, Hurley urged his colleagues “to start being diligent about rejecting copyrighted / inappropriate content,” noting that “there is a cnn clip of the shuttle clip on the site today, if the boys from Turner would come to the site, they might be pissed?” Again, Chen resisted:

but we should just keep that stuff on the site. i really don't see what will happen. what? someone from cnn sees it? he happens to be someone with power? he happens to want to take it down right away. he gets in touch with cnn legal. 2 weeks later, we get a cease & desist letter. we take the video down.

And again, Karim agreed, indicating that “the CNN space shuttle clip, I like. we can remove it once we're bigger and better known, but for now that clip is fine.”

Upon a review of the record, we are persuaded that the plaintiffs may have raised a material issue of fact regarding YouTube's knowledge or awareness of specific instances of infringement. The foregoing Premier League e-mails request the identification and removal of “clearly infringing, official broadcast footage.” The March 2006 report indicates Karim's awareness of specific clips that he perceived to be “blatantly illegal.” Similarly, the Bud Light and space shuttle e-mails refer to particular clips in the context of correspondence about whether to remove infringing material from the website. On these facts, a reasonable juror could conclude that YouTube had actual knowledge of specific infringing activity, or was at least aware of facts or circumstances from which specific infringing activity was apparent. See § 512(c)(1)(A)(i)-(ii). Accordingly, we hold that summary judgment to YouTube on all clips-in-suit, especially in the absence of any detailed examination of the extensive record on summary judgment, was premature.^[9]

We hasten to note, however, that although the foregoing e-mails were annexed as exhibits to the summary judgment papers, it is unclear whether the clips referenced therein are among the current clips-in-suit. By definition, only the current clips-in-suit are at issue in this litigation. Accordingly, we vacate the order granting summary judgment and instruct the District Court to determine on remand whether any specific infringements of which YouTube had knowledge or awareness correspond to the clips-in-suit in these actions.

ii. “Willful Blindness”

The plaintiffs further argue that the District Court erred in granting summary judgment to the defendants despite evidence that YouTube was “willfully blind” to specific infringing activity. On this issue of first impression, we consider the application of the common law willful blindness doctrine in the DMCA context.

 “The principle that willful blindness is tantamount to knowledge is hardly novel.” Tiffany (NJ) Inc. v. eBay, Inc., 600 F.3d 93, 110 n. 16 (2d Cir.2010) (collecting [676 F.3d 35] cases); see In re Aimster Copyright Litig., 33,4 F.3d 643 (7th Cir.2003) (“Willful blindness is knowledge, in copyright law ... as it is in the law generally.”). A person is “willfully blind” or engages in “conscious avoidance” amounting to knowledge where the person “ ‘was aware of a high probability of the fact in dispute and consciously avoided confirming that fact.’ ” United States v. Aina-Marshall, 336 F.3d 167, 170 (2d Cir.2003) (quoting United States v. Rodriguez, 983 F.2d 455, 458 (2d Cir.1993)); cf. Global–Tech Appliances, Inc. v. SEB S.A., ––– U.S. ––––, 131 S.Ct. 2060, 2070–71, 179 L.Ed.2d 1167 (2011) (applying the willful blindness doctrine in a patent infringement case). Writing in the trademark infringement context, we have held that “[a] service provider is not ... permitted willful blindness. When it has reason to suspect that users of its service are infringing a protected mark, it may not shield itself from learning of the particular infringing transactions by looking the other way.” Tiffany, 600 F.3d at 109.

The DMCA does not mention willful blindness. As a general matter, we interpret a statute to abrogate a common law principle only if the statute “speak[s] directly to the question addressed by the common law.” Matar v. Dichter, 563 F.3d 9, 14 (2d Cir.2009) (internal quotation marks omitted). The relevant question, therefore, is whether the DMCA “speak[s] directly” to the principle of willful blindness. Id. (internal quotation marks omitted). The DMCA provision most relevant to the abrogation inquiry is § 512(m), which provides that safe harbor protection shall not be conditioned on “a service provider monitoring its service or affirmatively seeking facts indicating infringing activity, except to the extent consistent with a standard technical measure complying with the provisions of subsection (i).” 17 U.S.C. § 512(m)(1). Section 512(m) is explicit: DMCA safe harbor protection cannot be conditioned on affirmative monitoring by a service provider. For that reason, § 512(m) is incompatible with a broad common law duty to monitor or otherwise seek out infringing activity based on general awareness that infringement may be occurring. That fact does not, however, dispose of the abrogation inquiry; as previously noted, willful blindness cannot be defined as an affirmative duty to monitor. See Aina–Marshall, 336 F.3d at 170 (holding that a person is “willfully blind” where he “was aware of a high probability of the fact in dispute and consciously avoided confirming that fact”). Because the statute does not “speak[ ] directly” to the willful blindness doctrine, § 512(m) limits—but does not abrogate—the doctrine. Accordingly, we hold that the willful blindness doctrine may be applied, in appropriate circumstances, to demonstrate knowledge or awareness of specific instances of infringement under the DMCA.

The District Court cited § 512(m) for the proposition that safe harbor protection does not require affirmative monitoring, Viacom, 718 F.Supp.2d at 524, but did not expressly address the principle of willful blindness or its relationship to the DMCA safe harbors. As a result, whether the defendants made a “deliberate effort to avoid guilty knowledge,” In re Aimster, 33,4 F.3d at 650, remains a fact question for the District Court to consider in the first instance on remand.^[10]

[676 F.3d 36] B. Control and Benefit: § 512(c)(1)(B)

 Apart from the foregoing knowledge provisions, the § 512(c) safe harbor provides that an eligible service provider must “not receive a financial benefit directly attributable to the infringing activity, in a case in which the service provider has the right and ability to control such activity.” 17 U.S.C. § 512(c)(1)(B). The District Court addressed this issue in a single paragraph, quoting from § 512(c)(1)(B), the so-called “control and benefit” provision, and concluding that “[t]he ‘right and ability to control’ the activity requires knowledge of it, which must be item-specific.” Viacom, 718 F.Supp.2d at 527. For the reasons that follow, we hold that the District Court erred by importing a specific knowledge requirement into the control and benefit provision, and we therefore remand for further fact-finding on the issue of control.

1. “Right and Ability to Control” Infringing Activity

On appeal, the parties advocate two competing constructions of the “right and ability to control” infringing activity. 17 U.S.C. § 512(c)(1)(B). Because each is fatally flawed, we reject both proposed constructions in favor of a fact-based inquiry to be conducted in the first instance by the District Court.

The first construction, pressed by the defendants, is the one adopted by the District Court, which held that “the provider must know of the particular case before he can control it.” Viacom, 718 F.Supp.2d at 527. The Ninth Circuit recently agreed, holding that “until [the service provider] becomes aware of specific unauthorized material, it cannot exercise its ‘power or authority’ over the specific infringing item. In practical terms, it does not have the kind of ability to control infringing activity the statute contemplates.” UMG Recordings, Inc. v. Shelter Capital Partners LLC, 667 F.3d 1022, 1041 (9th Cir.2011). The trouble with this construction is that importing a specific knowledge requirement into § 512(c)(1)(B) renders the control provision duplicative of § 512(c)(1)(A). Any service provider that has item-specific knowledge of infringing activity and thereby obtains financial benefit would already be excluded from the safe harbor under § 512(c)(1)(A) for having specific knowledge of infringing material and failing to effect expeditious removal. No additional service provider would be excluded by § 512(c)(1)(B) that was not already excluded by § 512(c)(1)(A). Because statutory interpretations that render language superfluous are disfavored, Conn. ex rel. Blumenthal, 228 F.3d at 88, we reject the District Court's interpretation of the control provision.

The second construction, urged by the plaintiffs, is that the control provision codifies the common law doctrine of vicarious copyright liability. The common law imposes liability for vicarious copyright infringement “[w]hen the right and ability to supervise coalesce with an obvious and direct financial interest in the exploitation of copyrighted materials—even in the absence of actual knowledge that the copyright mono [poly] is being impaired.” Shapiro, Bernstein & Co. v. H.L. Green Co., 316 F.2d 304, 307 (2d Cir.1963); cf. Metro–Goldwyn–Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913, 930 n. 9, 125 S.Ct. 2764, 162 L.Ed.2d 781 (2005). To support their codification argument, the plaintiffs rely [676 F.3d 37] on a House Report relating to a preliminary version of the DMCA: “The ‘right and ability to control’ language ... codifies the second element of vicarious liability.... Subparagraph (B) is intended to preserve existing case law that examines all relevant aspects of the relationship between the primary and secondary infringer.” H.R.Rep. No. 105–551(I), at 26 (1998). In response, YouTube notes that the codification reference was omitted from the committee reports describing the final legislation, and that Congress ultimately abandoned any attempt to “embark[ ] upon a wholesale clarification” of vicarious liability, electing instead “to create a series of ‘safe harbors' for certain common activities of service providers.” S.Rep. No. 105–190, at 19.

Happily, the future of digital copyright law does not turn on the confused legislative history of the control provision. The general rule with respect to common law codification is that when “Congress uses terms that have accumulated settled meaning under the common law, a court must infer, unless the statute otherwise dictates, that Congress means to incorporate the established meaning of those terms.” Neder v. United States, 527 U.S. 1, 21, 119 S.Ct. 1827, 144 L.Ed.2d 35 (1999) (ellipsis and internal quotation marks omitted). Under the common law vicarious liability standard, “ ‘[t]he ability to block infringers' access to a particular environment for any reason whatsoever is evidence of the right and ability to supervise.’ ” Arista Records LLC v. Usenet.com, Inc., 633 F.Supp.2d 124, 157 (S.D.N.Y.2009) (alteration in original) (quoting A & M Records, Inc. v. Napster, Inc., 239 F.3d 1004, 1023 (9th Cir.2001)). To adopt that principle in the DMCA context, however, would render the statute internally inconsistent. Section 512(c) actually presumes that service providers have the ability to “block ... access” to infringing material. Id. at 157; see Shelter Capital, 667 F.3d at 1042–43. Indeed, a service provider who has knowledge or awareness of infringing material or who receives a takedown notice from a copyright holder is required to “remove, or disable access to, the material” in order to claim the benefit of the safe harbor. 17 U.S.C. § 512(c)(1)(A)(iii) & (C). But in taking such action, the service provider would—in the plaintiffs' analysis—be admitting the “right and ability to control” the infringing material. Thus, the prerequisite to safe harbor protection under § 512(c)(1)(A)(iii) & (C) would at the same time be a disqualifier under § 512(c)(1)(B).

Moreover, if Congress had intended § 512(c)(1)(B) to be coextensive with vicarious liability, “the statute could have accomplished that result in a more direct manner.” Shelter Capital, 667 F.3d at 1045.

It is conceivable that Congress ... intended that [service providers] which receive a financial benefit directly attributable to the infringing activity would not, under any circumstances, be able to qualify for the subsection (c) safe harbor. But if that was indeed their intention, it would have been far simpler and much more straightforward to simply say as much. Id. (alteration in original) (quoting Ellison v. Robertson, 189 F.Supp.2d 1051, 1061 (C.D.Cal.2002), aff'd in part and rev'd in part on different grounds, 357 F.3d 1072 (9th Cir.2004)).

In any event, the foregoing tension—elsewhere described as a “predicament”^[11] and a “catch22”^[12]—is sufficient to establish that the control provision “dictates” [676 F.3d 38] a departure from the common law vicarious liability standard, Neder, 527 U.S. at 21, 119 S.Ct. 1827. Accordingly, we conclude that the “right and ability to control” infringing activity under § 512(c)(1)(B) “requires something more than the ability to remove or block access to materials posted on a service provider's website.” MP3tunes, LLC, 821 F.Supp.2d at 645, 2011 WL 5104616, at *14; accord Wolk v. Kodak Imaging Network, Inc., ––– F.Supp.2d ––––, ––––, 2012 WL 11270, at *21 (S.D.N.Y. Jan. 3, 2012); UMG II, 665 F.Supp.2d at 1114–15; Io Grp., Inc. v. Veoh Networks, Inc., 586 F.Supp.2d 1132, 1151 (N.D.Cal.2008); Corbis Corp. v. Amazon.com, Inc., 351 F.Supp.2d 1090, 1110 (W.D.Wash.2004), overruled on other grounds by Cosmetic Ideas, Inc. v. IAC/Interactivecorp., 606 F.3d 612 (9th Cir.2010). The remaining—and more difficult—question is how to define the “something more” that is required.

To date, only one court has found that a service provider had the right and ability to control infringing activity under § 512(c)(1)(B).^[13] In Perfect 10, Inc. v. Cybernet Ventures, Inc., 213 F.Supp.2d 1146 (C.D.Cal.2002), the court found control where the service provider instituted a monitoring program by which user websites received “detailed instructions regard[ing] issues of layout, appearance, and content.” Id. at 1173. The service provider also forbade certain types of content and refused access to users who failed to comply with its instructions. Id. Similarly, inducement of copyright infringement under Metro–Goldwyn–Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913, 125 S.Ct. 2764, 162 L.Ed.2d 781 (2005), which “premises liability on purposeful, culpable expression and conduct,” id. at 937, 125 S.Ct. 2764, might also rise to the level of control under § 512(c)(1)(B). Both of these examples involve a service provider exerting substantial influence on the activities of users, without necessarily—or even frequently—acquiring knowledge of specific infringing activity.

In light of our holding that § 512(c)(1)(B) does not include a specific knowledge requirement, we think it prudent to remand to the District Court to consider in the first instance whether the plaintiffs have adduced sufficient evidence to allow a reasonable jury to conclude that YouTube had the right and ability to control the infringing activity and received a financial benefit directly attributable to that activity.

C. “By Reason of” Storage: § 512(c)(1)

 The § 512(c) safe harbor is only available when the infringement occurs “by reason of the storage at the direction of a user of material that resides on a system or network controlled or operated by or for the service provider.” 17 U.S.C. § 512(c)(1). In this case, the District Court held that YouTube's software functions fell within the safe harbor for infringements that occur “by reason of” user storage. Viacom, 718 F.Supp.2d at 526 (noting that a contrary holding would “confine[ ] the word ‘storage’ too narrowly to meet the statute's purpose”). For the reasons that follow, we affirm that holding [676 F.3d 39] with respect to three of the challenged software functions—the conversion (or “transcoding”) of videos into a standard display format, the playback of videos on “watch” pages, and the “related videos” function. We remand for further fact-finding with respect to a fourth software function, involving the third-party syndication of videos uploaded to YouTube.

As a preliminary matter, we note that “the structure and language of OCILLA indicate that service providers seeking safe harbor under [§ ] 512(c) are not limited to merely storing material.” Io Grp., 586 F.Supp.2d at 1147. The structure of the statute distinguishes between so-called “conduit only” functions under § 512(a) and the functions addressed by § 512(c) and the other subsections. See 17 U.S.C. § 512(n) (“Subsections (a), (b), (c), and (d) describe separate and distinct functions for purposes of applying this section.”). Most notably, OCILLA contains two definitions of “service provider.” 17 U.S.C. § 512(k)(1)(A)-(B). The narrower definition, which applies only to service providers falling under § 512(a), is limited to entities that “offer[ ] the transmission, routing or providing of connections for digital online communications, between or among points specified by a user, of material of the user's choosing, without modification to the content of the material as sent or received.” Id. § 512(k)(1)(A) (emphasis added). No such limitation appears in the broader definition, which applies to service providers—including YouTube—falling under § 512(c). Under the broader definition, “the term ‘service provider’ means a provider of online services or network access, or the operator of facilities therefor, and includes an entity described in subparagraph (A).” Id. § 512(k)(1)(B). In the absence of a parallel limitation on the ability of a service provider to modify user-submitted material, we conclude that § 512(c) “is clearly meant to cover more than mere electronic storage lockers.” UMG Recordings, Inc. v. Veoh Networks, Inc., 620 F.Supp.2d 1081, 1088 (C.D.Cal.2008) (“UMG I”).

The relevant case law makes clear that the § 512(c) safe harbor extends to software functions performed “for the purpose of facilitating access to user-stored material.” Id.; see Shelter Capital, 667 F.3d at 1031–35. Two of the software functions challenged here—transcoding and playback—were expressly considered by our sister Circuit in Shelter Capital, which held that liability arising from these functions occurred “by reason of the storage at the direction of a user.” 17 U.S.C. § 512(c); see Shelter Capital, 667 F.3d at 1027–28, 1031; see also UMG I, 620 F.Supp.2d at 1089–91; Io Group, 586 F.Supp.2d at 1146–48. Transcoding involves “[m]aking copies of a video in a different encoding scheme” in order to render the video “viewable over the Internet to most users.” Supp. Joint App'x I:236. The playback process involves “deliver[ing] copies of YouTube videos to a user's browser cache” in response to a user request. Id. at 239. The District Court correctly found that to exclude these automated functions from the safe harbor would eviscerate the protection afforded to service providers by § 512(c). Viacom, 718 F.Supp.2d at 526–27.

A similar analysis applies to the “related videos” function, by which a YouTube computer algorithm identifies and displays “thumbnails” of clips that are “related” to the video selected by the user. The plaintiffs claim that this practice constitutes content promotion, not “access” to stored content, and therefore falls beyond the scope of the safe harbor. Citing similar language in the Racketeer Influenced and Corrupt Organizations Act (“RICO”), 18 U.S.C. §§ 1961–68, and the Clayton [676 F.3d 40] Act, 15 U.S.C. §§ 12 et seq., the plaintiffs argue that the statutory phrase “by reason of” requires a finding of proximate causation between the act of storage and the infringing activity. See, e.g., Holmes v. Sec. Investor Prot. Corp., 503 U.S. 258, 267–68, 112 S.Ct. 1311, 117 L.Ed.2d 532 (1992) (holding that the “by reason of” language in the RICO statute requires proximate causation). But even if the plaintiffs are correct that § 512(c) incorporates a principle of proximate causation—a question we need not resolve here—the indexing and display of related videos retain a sufficient causal link to the prior storage of those videos. The record makes clear that the related videos algorithm “is fully automated and operates solely in response to user input without the active involvement of YouTube employees.” Supp. Joint App'x I:237. Furthermore, the related videos function serves to help YouTube users locate and gain access to material stored at the direction of other users. Because the algorithm “is closely related to, and follows from, the storage itself,” and is “narrowly directed toward providing access to material stored at the direction of users,” UMG I, 620 F.Supp.2d at 1092, we conclude that the related videos function is also protected by the § 512(c) safe harbor.

The final software function at issue here—third-party syndication—is the closest case. In or around March 2007, YouTube transcoded a select number of videos into a format compatible with mobile devices and “syndicated” or licensed the videos to Verizon Wireless and other companies. The plaintiffs argue—with some force—that business transactions do not occur at the “direction of a user” within the meaning of § 512(c)(1) when they involve the manual selection of copyrighted material for licensing to a third party. The parties do not dispute, however, that none of the clips-in-suit were among the approximately 2,000 videos provided to Verizon Wireless. In order to avoid rendering an advisory opinion on the outer boundaries of the storage provision, we remand for fact-finding on the question of whether any of the clips-in-suit were in fact syndicated to any other third party.

D. Other Arguments

1. Repeat Infringer Policy

The class plaintiffs briefly argue that YouTube failed to comply with the requirements of § 512(i), which conditions safe harbor eligibility on the service provider having “adopted and reasonably implemented ... a policy that provides for the termination in appropriate circumstances of subscribers and account holders of the service provider's system or network who are repeat infringers.” 17 U.S.C. § 512(i)(1)(A). Specifically, the class plaintiffs allege that YouTube “deliberately set up its identification tools to try to avoid identifying infringements of class plaintiffs' works.” This allegation rests primarily on the assertion that YouTube permitted only designated “partners” to gain access to content identification tools by which YouTube would conduct network searches and identify infringing material.^[14]

Because the class plaintiffs challenge YouTube's deployment of search technology, [676 F.3d 41] we must consider their § 512(i) argument in conjunction with § 512(m). As previously noted, § 512(m) provides that safe harbor protection cannot be conditioned on “a service provider monitoring its service or affirmatively seeking facts indicating infringing activity, except to the extent consistent with a standard technical measure complying with the provisions of subsection (i).” 17 U.S.C. § 512(m)(1) (emphasis added). In other words, the safe harbor expressly disclaims any affirmative monitoring requirement—except to the extent that such monitoring comprises a “standard technical measure” within the meaning of § 512(i). Refusing to accommodate or implement a “standard technical measure” exposes a service provider to liability; refusing to provide access to mechanisms by which a service provider affirmatively monitors its own network has no such result. In this case, the class plaintiffs make no argument that the content identification tools implemented by YouTube constitute “standard technical measures,” such that YouTube would be exposed to liability under § 512(i). For that reason, YouTube cannot be excluded from the safe harbor by dint of a decision to restrict access to its proprietary search mechanisms.

2. Affirmative Claims

Finally, the plaintiffs argue that the District Court erred in denying summary judgment to the plaintiffs on their claims of direct infringement, vicarious liability, and contributory liability under Metro–Goldwyn–Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913, 125 S.Ct. 2764, 162 L.Ed.2d 781 (2005). In granting summary judgment to the defendants, the District Court held that YouTube “qualif[ied] for the protection of ... § 512(c),” and therefore denied the plaintiffs' cross-motion for summary judgment without comment. Viacom, 718 F.Supp.2d at 529.

The District Court correctly determined that a finding of safe harbor application necessarily protects a defendant from all affirmative claims for monetary relief. 17 U.S.C. § 512(c)(1); see H.R.Rep. No. 105–551(II), at 50; S.Rep. No. 105–190, at 20; cf. 17 U.S.C. § 512(j) (setting forth the scope of injunctive relief available under § 512). For the reasons previously stated, further fact-finding is required to determine whether YouTube is ultimately entitled to safe harbor protection in this case. Accordingly, we vacate the order denying summary judgment to the plaintiffs and remand the cause without expressing a view on the merits of the plaintiffs' affirmative claims.

CONCLUSION

To summarize, we hold that:

(1) The District Court correctly held that 17 U.S.C. § 512(c)(1)(A) requires knowledge or awareness of facts or circumstances that indicate specific and identifiable instances of infringement;

(2) However, the June 23, 2010 order granting summary judgment to YouTube is VACATED because a reasonable jury could conclude that YouTube had knowledge or awareness under § 512(c)(1)(A) at least with respect to a handful of specific clips; the cause is REMANDED for the District Court to determine whether YouTube had knowledge or awareness of any specific instances of infringement corresponding to the clips-in-suit;

(3) The willful blindness doctrine may be applied, in appropriate circumstances, to demonstrate knowledge or awareness of specific instances of infringement under § 512(c)(1)(A); the cause is REMANDED for the [676 F.3d 42] District Court to consider the application of the willful blindness doctrine in the first instance;

(4) The District Court erred by requiring “item-specific” knowledge of infringement in its interpretation of the “right and ability to control” infringing activity under 17 U.S.C. § 512(c)(1)(B), and the judgment is REVERSED insofar as it rests on that erroneous construction of the statute; the cause is REMANDED for further fact-finding by the District Court on the issues of control and financial benefit;

(5) The District Court correctly held that three of the challenged YouTube software functions—replication, playback, and the related videos feature—occur “by reason of the storage at the direction of a user” within the meaning of 17 U.S.C. § 512(c)(1), and the judgment is AFFIRMED insofar as it so held; the cause is REMANDED for further fact-finding regarding a fourth software function, involving the syndication of YouTube videos to third parties.

On remand, the District Court shall allow the parties to brief the following issues, with a view to permitting renewed motions for summary judgment as soon as practicable:

(A) Whether, on the current record, YouTube had knowledge or awareness of any specific infringements (including any clips-in-suit not expressly noted in this opinion);

(B) Whether, on the current record, YouTube willfully blinded itself to specific infringements;

(C) Whether YouTube had the “right and ability to control” infringing activity within the meaning of § 512(c)(1)(B); and

(D) Whether any clips-in-suit were syndicated to a third party and, if so, whether such syndication occurred “by reason of the storage at the direction of the user” within the meaning of § 512(c)(1), so that YouTube may claim the protection of the § 512(c) safe harbor.

We leave to the sound discretion of the District Court the question of whether some additional, guided discovery is appropriate in order to resolve “(C)” (“[w]hether YouTube had ‘the right and ability to control’ infringing activity”), and “(D)” (“[w]hether any clips-in-suit were syndicated to a third party”). As noted above, for purposes of this case, the record with respect to “(A)” (“[w]hether ... YouTube had knowledge or awareness of any specific infringements”) and “(B)” (“[w]hether. YouTube willfully blinded itself to specific infringements”) is now complete.

Each party shall bear its own costs.

APPENDIX ARELEVANT PROVISIONS OF THE DIGITAL MILLENNIUM COPYRIGHT ACT 17 U.S.C. § 512

(c) Information residing on systems or networks at direction of users.—

(1) In general.—A service provider shall not be liable for monetary relief, or, except as provided in subsection (j), for injunctive or other equitable relief, for infringement of copyright by reason of the storage at the direction of a user of material that resides on a system or network controlled or operated by or for the service provider, if the service provider—

(A) (i) does not have actual knowledge that the material or an activity using the material on the system or network is infringing;

[676 F.3d 43] (ii) in the absence of such actual knowledge, is not aware of facts or circumstances from which infringing activity is apparent; or

(iii) upon obtaining such knowledge or awareness, acts expeditiously to remove, or disable access to, the material;

(B) does not receive a financial benefit directly attributable to the infringing activity, in a case in which the service provider has the right and ability to control such activity; and

(C) upon notification of claimed infringement as described in paragraph (3), responds expeditiously to remove, or disable access to, the material that is claimed to be infringing or to be the subject of infringing activity.

(2) Designated agent.—The limitations on liability established in this subsection apply to a service provider only if the service provider has designated an agent to receive notifications of claimed infringement described in paragraph (3), by making available through its service, including on its website in a location accessible to the public, and by providing to the Copyright Office, substantially the following information:

(A) the name, address, phone number, and electronic mail address of the agent.

(B) other contact information which the Register of Copyrights may deem appropriate.

The Register of Copyrights shall maintain a current directory of agents available to the public for inspection, including through the Internet, and may require payment of a fee by service providers to cover the costs of maintaining the directory.

(3) Elements of notification.—

(A) To be effective under this subsection, a notification of claimed infringement must be a written communication provided to the designated agent of a service provider that includes substantially the following:

(i) A physical or electronic signature of a person authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

(ii) Identification of the copyrighted work claimed to have been infringed, or, if multiple copyrighted works at a single online site are covered by a single notification, a representative list of such works at that site.

(iii) Identification of the material that is claimed to be infringing or to be the subject of infringing activity and that is to be removed or access to which is to be disabled, and information reasonably sufficient to permit the service provider to locate the material.

(vi) Information reasonably sufficient to permit the service provider to contact the complaining party, such as an address, telephone number, and, if available, an electronic mail address at which the complaining party may be contacted.

(iv) A statement that the complaining party has a good faith belief that use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

(v) A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

(B)(i) Subject to clause (ii), a notification from a copyright owner or from a person authorized to act on behalf of the copyright owner that fails to comply substantially with the provisions of subparagraph

[676 F.3d 44] (A) shall not be considered under paragraph (1)(A) in determining whether a service provider has actual knowledge or is aware of facts or circumstances from which infringing activity is apparent.

(ii) In a case in which the notification that is provided to the service provider's designated agent fails to comply substantially with all the provisions of subparagraph (A) but substantially complies with clauses (ii), (iii), and (iv) of subparagraph (A), clause (i) of this subparagraph applies only if the service provider promptly attempts to contact the person making the notification or takes other reasonable steps to assist in the receipt of notification that substantially complies with all the provisions of subparagraph (A).

(i) Conditions for Eligibility.—

(1) Accommodation of technology.—The limitations on liability established by this section shall apply to a service provider only if the service provider—

(A) has adopted and reasonably implemented, and informs subscribers and account holders of the service provider's system or network of, a policy that provides for the termination in appropriate circumstances of subscribers and account holders of the service provider's system or network who are repeat infringers; and

(B) accommodates and does not interfere with standard technical measures.

(2) Definition.—As used in this subsection, the term “standard technical measures” means technical measures that are used by copyright owners to identify or protect copyrighted works and—

(A) have been developed pursuant to a broad consensus of copyright owners and service providers in an open, fair, voluntary, multi-industry standards process;

(B) are available to any person on reasonable and nondiscriminatory terms; and

(C) do not impose substantial costs on service providers or substantial burdens on their systems or networks.

(k) Definitions.—

(1) Service provider.—

(A) As used in subsection (a), the term “service provider” means an entity offering the transmission, routing, or providing of connections for digital online communications, between or among points specified by a user, of material of the user's choosing, without modification to the content of the material as sent or received.

(B) As used in this section, other than subsection (a), the term “service provider” means a provider of online services or network access, or the operator of facilities therefor, and includes an entity described in subparagraph (A).

(2) Monetary relief.—As used in this section, the term “monetary relief” means damages, costs, attorneys' fees, and any other form of monetary payment.

(m) Protection of privacy.—Nothing in this section shall be construed to condition the applicability of subsections (a) through (d) on—

(1) a service provider monitoring its service or affirmatively seeking facts indicating infringing activity, except to the extent consistent with a standard technical measure complying with the provisions of subsection (i); or

(2) a service provider gaining access to, removing, or disabling access to material [676 F.3d 45] in cases in which such conduct is prohibited by law.

(n) Construction.—

Subsections (a), (b), (c), and (d) describe separate and distinct functions for purposes of applying this section. Whether a service provider qualifies for the limitation on liability in any one of those subsections shall be based solely on the criteria in that subsection, and shall not affect a determination of whether that service provider qualifies for the limitations on liability under any other such subsection.

[*] The Honorable Roger J. Miner, who was originally assigned to the panel, died prior to the resolution of this case. The remaining two members of the panel, who are in agreement, have determined the matter. See 28 U.S.C. § 46(d); 2d Cir. IOP E(b); United States v. Desimone, 140 F.3d 457, 458–59 (2d Cir.1998).

[1] The relevant provisions of 17 U.S.C. § 512(c) appear in Appendix A.

[2] The plaintiffs-appellants in Viacom Int'l, Inc. v. YouTube, Inc., No. 10–3270–cv, are Viacom, Comedy Partners, Country Music Television, Inc., Paramount Pictures Corporation, and Black Entertainment Television, LLC (jointly, the “Viacom plaintiffs”). The plaintiffs-appellants in Football Ass'n Premier League Ltd. v. YouTube, Inc., No. 10–3342–cv, are Premier League, Bourne Co., Cal IV Entertainment, LLC, Cherry Lane Music Publishing Company, Inc., X–Ray Dog Music, Inc., Fédération Française de Tennis, Murbo Music Publishing, Inc., and Stage Three Music (US), Inc. (jointly, the “class plaintiffs”).

[3] The class plaintiffs also sought class certification pursuant to Rule 23 of the Federal Rules of Civil Procedure.

[4] The “Flash” format “is a highly compressed streaming format that begins to play instantly. Unlike other delivery methods, it does not require the viewer to download the entire video file before viewing.” Joint App'x IV:73.

[5] Doctrines of secondary copyright infringement include contributory, vicarious, and inducement liability. See Metro–Goldwyn–Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913, 930–31, 936–37, 125 S.Ct. 2764, 162 L.Ed.2d 781 (2005).

[6] National Music Publishers' Association, one of the named plaintiffs in the putative class action, seeks only equitable relief.

[7] It is undisputed that all clips-in-suit had been removed from the YouTube website by the time of summary judgment, mostly in response to DMCA takedown notices. Viacom Int'l, 718 F.Supp.2d at 519.

[8] Veoh Networks operates a website that “allows people to share video content over the Internet.” Shelter Capital, 667 F.3d at 1026.

[9] We express no opinion as to whether the evidence discussed above will prove sufficient to withstand a renewed motion for summary judgment by YouTube on remand. In particular, we note that there is at least some evidence that the search requested by Walker in his February 7, 2007 e-mail was never carried out. See Joint App'x III:256. We also note that the class plaintiffs have failed to identify evidence indicating that any infringing content discovered as a result of Walker's request in fact remained on the YouTube website. The class plaintiffs, drawing on the voluminous record in this case, may be able to remedy these deficiencies in their briefing to the District Court on remand.

[10] Our recent decision in Tiffany (NJ) Inc. v. eBay Inc., 600 F.3d 93 (2d Cir.2010), lends support to this result. In Tiffany, we rejected a willful blindness challenge, holding that although eBay “knew as a general matter that counterfeit Tiffany products were listed and sold through its website,” such knowledge “is insufficient to trigger liability.” Id. at 110. In so holding, however, we rested on the extensive findings of the district court with respect to willful blindness. Id. (citing Tiffany (NJ) Inc. v. eBay, Inc., 576 F.Supp.2d 463, 513 (S.D.N.Y.2008)). Thus, the Tiffany holding counsels in favor of explicit fact-finding on the issue of willful blindness.

[11] Ellison, 189 F.Supp.2d at 1061.

[12] UMG II, 665 F.Supp.2d at 1112.

[13] Other courts have suggested that control may exist where the service provider is “actively involved in the listing, bidding, sale and delivery” of items offered for sale, Hendrickson v. eBay, Inc., 165 F.Supp.2d 1082, 1094 (C.D.Cal.2001), or otherwise controls vendor sales by previewing products prior to their listing, editing product descriptions, or suggesting prices, Corbis Corp., 351 F.Supp.2d at 1110. Because these cases held that control did not exist, however, it is not clear that the practices cited therein are individually sufficient to support a finding of control.

[14] The class plaintiffs also assert, in a single sentence, that YouTube failed to implement any repeat infringer policy prior to March 2006, and that the defendants are therefore excluded from the safe harbor for any infringing activity before that date. This one-sentence argument is insufficient to raise the issue for review before this Court. Accordingly, we deem the issue waived on appeal. See, e.g., Norton v. Sam's Club, 145 F.3d 114, 117 (2d Cir.1998) (“Issues not sufficiently argued in the briefs are considered waived and normally will not be addressed on appeal.”).

Respondent companies distribute free software that allows computer users to share electronic files through peer-to-peer networks, so called because the computers communicate directly with each other, not through central servers. Although such networks can be used to share any type of digital file, recipients of respondents' software have mostly used them to share copyrighted music and video files without authorization. Seeking damages and an injunction, a group of movie studios and other copyright holders (hereinafter MGM) sued respondents for their users' copyright infringements, alleging that respondents knowingly and intentionally distributed their software to enable users to infringe copyrighted works in violation of the Copyright Act.

Discovery revealed that billions of files are shared across peer-to-peer networks each month. Respondents are aware that users employ their software primarily to download copyrighted files, although the decentralized networks do not reveal which files are copied, and when. Respondents have sometimes learned about the infringement directly when users have e-mailed questions regarding copyrighted works, and respondents have replied with guidance. Respondents are not merely passive recipients of information about infringement. The record is replete with evidence that when they began to distribute their free software, each of them clearly voiced the objective that recipients use the software to download copyrighted works and took active steps to encourage infringement. After the notorious file-sharing service, Napster, was sued by copyright holders for facilitating copyright infringement, both respondents promoted and marketed themselves as Napster alternatives. They receive no revenue from users, but, instead, generate income by selling advertising space, then streaming the advertising to their users. As the number of users increases, advertising opportunities are worth more. There is no evidence that either respondent made an effort to filter copyrighted material from users' downloads or otherwise to impede the sharing of copyrighted files.

While acknowledging that respondents' users had directly infringed MGM's copyrights, the District Court nonetheless granted respondents summary judgment as to liability arising from distribution of their software. [545 U.S. 914] The Ninth Circuit affirmed. It read Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417, as holding that the distribution of a commercial product capable of substantial noninfringing uses could not give rise to contributory liability for infringement unless the distributor had actual knowledge of specific instances of infringement and failed to act on that knowledge. Because the appeals court found respondents' software to be capable of substantial noninfringing uses and because respondents had no actual knowledge of infringement owing to the software's decentralized architecture, the court held that they were not liable. It also held that they did not materially contribute to their users' infringement because the users themselves searched for, retrieved, and stored the infringing files, with no involvement by respondents beyond providing the software in the first place. Finally, the court held that respondents could not be held liable under a vicarious infringement theory because they did not monitor or control the software's use, had no agreed-upon right or current ability to supervise its use, and had no independent duty to police infringement.

Held: One who distributes a device with the object of promoting its use to infringe copyright, as shown by clear expression or other affirmative steps taken to foster infringement, going beyond mere distribution with knowledge of third-party action, is liable for the resulting acts of infringement by third parties using the device, regardless of the device's lawful uses. Pp. 928-941.

(a) The tension between the competing values of supporting creativity through copyright protection and promoting technological innovation by limiting infringement liability is the subject of this case. Despite offsetting considerations, the argument for imposing indirect liability here is powerful, given the number of infringing downloads that occur daily using respondents' software. When a widely shared product is used to commit infringement, it may be impossible to enforce rights in the protected work effectively against all direct infringers, so that the only practical alternative is to go against the device's distributor for secondary liability on a theory of contributory or vicarious infringement. One infringes contributorily by intentionally inducing or encouraging direct infringement, and infringes vicariously by profiting from direct infringement while declining to exercise the right to stop or limit it. Although "[t]he Copyright Act does not expressly render anyone liable for [another's] infringement," Sony, 464 U. S., at 434, these secondary liability doctrines emerged from common law principles and are well established in the law, e. g., id., at 486. Pp. 928-931.

(b) Sony addressed a claim that secondary liability for infringement can arise from the very distribution of a commercial product. There, [545 U.S. 915] copyright holders sued Sony, the manufacturer of videocassette recorders, claiming that it was contributorily liable for the infringement that occurred when VCR owners taped copyrighted programs. The evidence showed that the VCR's principal use was "time-shifting," i. e., taping a program for later viewing at a more convenient time, which the Court found to be a fair, noninfringing use. 464 U. S., at 423-424. Moreover, there was no evidence that Sony had desired to bring about taping in violation of copyright or taken active steps to increase its profits from unlawful taping. Id., at 438. On those facts, the only conceivable basis for liability was on a theory of contributory infringement through distribution of a product. Id., at 439. Because the VCR was "capable of commercially significant noninfringing uses," the Court held that Sony was not liable. Id., at 442. This theory reflected patent law's traditional staple article of commerce doctrine that distribution of a component of a patented device will not violate the patent if it is suitable for use in other ways. 35 U. S. C. § 271(c). The doctrine absolves the equivocal conduct of selling an item with lawful and unlawful uses and limits liability to instances of more acute fault. In this case, the Ninth Circuit misread Sony to mean that when a product is capable of substantial lawful use, the producer cannot be held contributorily liable for third parties' infringing use of it, even when an actual purpose to cause infringing use is shown, unless the distributors had specific knowledge of infringement at a time when they contributed to the infringement and failed to act upon that information. Sony did not displace other secondary liability theories. Pp. 931-934.

(c) Nothing in Sony requires courts to ignore evidence of intent to promote infringement if such evidence exists. It was never meant to foreclose rules of fault-based liability derived from the common law. 464 U. S., at 439. Where evidence goes beyond a product's characteristics or the knowledge that it may be put to infringing uses, and shows statements or actions directed to promoting infringement, Sony's staple-article rule will not preclude liability. At common law a copyright or patent defendant who "not only expected but invoked [infringing use] by advertisement" was liable for infringement. Kalem Co. v. Harper Brothers, 222 U. S. 55, 62-63. The rule on inducement of infringement as developed in the early cases is no different today. Evidence of active steps taken to encourage direct infringement, such as advertising an infringing use or instructing how to engage in an infringing use, shows an affirmative intent that the product be used to infringe, and overcomes the law's reluctance to find liability when a defendant merely sells a commercial product suitable for some lawful use. A rule that premises liability on purposeful, culpable expression and conduct [545 U.S. 916] does nothing to compromise legitimate commerce or discourage innovation having a lawful promise. Pp. 934-937.

(d) On the record presented, respondents' unlawful objective is unmistakable. The classic instance of inducement is by advertisement or solicitation that broadcasts a message designed to stimulate others to commit violations. MGM argues persuasively that such a message is shown here. Three features of the evidence of intent are particularly notable. First, each of the respondents showed itself to be aiming to satisfy a known source of demand for copyright infringement, the market comprising former Napster users. Respondents' efforts to supply services to former Napster users indicate a principal, if not exclusive, intent to bring about infringement. Second, neither respondent attempted to develop filtering tools or other mechanisms to diminish the infringing activity using their software. While the Ninth Circuit treated that failure as irrelevant because respondents lacked an independent duty to monitor their users' activity, this evidence underscores their intentional facilitation of their users' infringement. Third, respondents make money by selling advertising space, then by directing ads to the screens of computers employing their software. The more their software is used, the more ads are sent out and the greater the advertising revenue. Since the extent of the software's use determines the gain to the distributors, the commercial sense of their enterprise turns on high-volume use, which the record shows is infringing. This evidence alone would not justify an inference of unlawful intent, but its import is clear in the entire record's context. Pp. 937-940.

(e) In addition to intent to bring about infringement and distribution of a device suitable for infringing use, the inducement theory requires evidence of actual infringement by recipients of the device, the software in this case. There is evidence of such infringement on a gigantic scale. Because substantial evidence supports MGM on all elements, summary judgment for respondents was error. On remand, reconsideration of MGM's summary judgment motion will be in order. Pp. 940-941.

380 F. 3d 1154, vacated and remanded.

SOUTER, J., delivered the opinion for a unanimous Court. GINSBURG, J., filed a concurring opinion, in which REHNQUIST, C. J., and KENNEDY, J., joined, post, p. 942. BREYER, J., filed a concurring opinion, in which STEVENS and O'CONNOR, JJ., joined, post, p. 949.

CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT

Donald B. Verrilli, Jr., argued the cause for petitioners. With him on the briefs for the motion picture studio and recording company petitioners were Ian Heath Gershengorn, [545 U.S. 917] William M. Hohengarten, Steven B. Fabrizio, Thomas J. Perrelli, Matthew J. Oppenheim, David E. Kendall, Thomas G. Hentoff, Kenneth W. Starr, Russell J. Frackman, George M. Borkowski, Robert M. Schwartz, Gregory P. Goeckner, Dean C. Garfield, Elaine J. Goldenberg, Matthew Hersh, Steven M. Marks, and Stanley Pierre-Louis. Carey R. Ramos, Peter L. Felcher, Aidan Synnott, Theodore K. Cheng, Kelli L. Sager, Andrew J. Thomas, Jeffrey H. Blum, and Jeffrey L. Fisher filed briefs for the songwriter and music publisher petitioners.

Acting Solicitor General Clement argued the cause for the United States as amicus curiae urging reversal. With him on the brief were Assistant Attorney General Keisler, Deputy Solicitor General Hungar, Douglas H. Hallward-Driemeier, Anthony A. Yang, David O. Carson, and John M. Whealan.

Richard G. Taranto argued the cause for respondents. With him on the brief were H. Bartow Farr III, Cindy A. Cohn, Fred Von Lohmann, Michael H. Page, Mark A. Lemley, Charles S. Baker, and Matthew A. Neco.^[*]

[545 U.S. 918] JUSTICE SOUTER delivered the opinion of the Court.

The question is under what circumstances the distributor of a product capable of both lawful and unlawful use is liable [545 U.S. 919] for acts of copyright infringement by third parties using the product. We hold that one who distributes a device with the object of promoting its use to infringe copyright, as shown by clear expression or other affirmative steps taken to foster infringement, is liable for the resulting acts of infringement by third parties.

Respondents, Grokster, Ltd., and StreamCast Networks, Inc., defendants in the trial court, distribute free software products that allow computer users to share electronic files through peer-to-peer networks, so called because users' computers communicate directly with each other, not through [545 U.S. 920] central servers. The advantage of peer-to-peer networks over information networks of other types shows up in their substantial and growing popularity. Because they need no central computer server to mediate the exchange of information or files among users, the high-bandwidth communications capacity for a server may be dispensed with, and the need for costly server storage space is eliminated. Since copies of a file (particularly a popular one) are available on many users' computers, file requests and retrievals may be faster than on other types of networks, and since file exchanges do not travel through a server, communications can take place between any computers that remain connected to the network without risk that a glitch in the server will disable the network in its entirety. Given these benefits in security, cost, and efficiency, peer-to-peer networks are employed to store and distribute electronic files by universities, government agencies, corporations, and libraries, among others.^[1]

Other users of peer-to-peer networks include individual recipients of Grokster's and StreamCast's software, and although the networks that they enjoy through using the software can be used to share any type of digital file, they have prominently employed those networks in sharing copyrighted music and video files without authorization. A group of copyright holders (MGM for short, but including motion picture studios, recording companies, songwriters, and music publishers) sued Grokster and StreamCast for their users' copyright infringements, alleging that they [545 U.S. 921] knowingly and intentionally distributed their software to enable users to reproduce and distribute the copyrighted works in violation of the Copyright Act, 17 U. S. C. § 101 et seq. (2000 ed. and Supp. II).^[2] MGM sought damages and an injunction.

Discovery during the litigation revealed the way the software worked, the business aims of each defendant company, and the predilections of the users. Grokster's eponymous software employs what is known as FastTrack technology, a protocol developed by others and licensed to Grokster. StreamCast distributes a very similar product except that its software, called Morpheus, relies on what is known as Gnutella technology.^[3] A user who downloads and installs either software possesses the protocol to send requests for files directly to the computers of others using software compatible with FastTrack or Gnutella. On the FastTrack network opened by the Grokster software, the user's request goes to a computer given an indexing capacity by the software and designated a supernode, or to some other computer with comparable power and capacity to collect temporary indexes of the files available on the computers of users connected to it. The supernode (or indexing computer) searches its own index and may communicate the search request to other supernodes. If the file is found, the supernode discloses its location to the computer requesting it, and the requesting user can download the file directly from the computer located. The copied file is placed in a designated sharing folder on the requesting user's computer, where it is available for other users to download in turn, along with any other file in that folder.[545 U.S. 922] In the Gnutella network made available by Morpheus, the process is mostly the same, except that in some versions of the Gnutella protocol there are no supernodes. In these versions, peer computers using the protocol communicate directly with each other. When a user enters a search request into the Morpheus software, it sends the request to computers connected with it, which in turn pass the request along to other connected peers. The search results are communicated to the requesting computer, and the user can download desired files directly from peers' computers. As this description indicates, Grokster and StreamCast use no servers to intercept the content of the search requests or to mediate the file transfers conducted by users of the software, there being no central point through which the substance of the communications passes in either direction.^[4]

Although Grokster and StreamCast do not therefore know when particular files are copied, a few searches using their software would show what is available on the networks the software reaches. MGM commissioned a statistician to conduct a systematic search, and his study showed that nearly 90% of the files available for download on the FastTrack system were copyrighted works.^[5] Grokster and StreamCast dispute this figure, raising methodological problems and arguing that free copying even of copyrighted works may be authorized by the rightholders. They also argue that potential noninfringing uses of their software are significant in kind, even if infrequent in practice. Some musical performers, for example, have gained new audiences by distributing [545 U.S. 923] their copyrighted works for free across peer-to-peer networks, and some distributors of unprotected content have used peer-to-peer networks to disseminate files, Shakespeare being an example. Indeed, StreamCast has given Morpheus users the opportunity to download the briefs in this very case, though their popularity has not been quantified.

As for quantification, the parties' anecdotal and statistical evidence entered thus far to show the content available on the FastTrack and Gnutella networks does not say much about which files are actually downloaded by users, and no one can say how often the software is used to obtain copies of unprotected material. But MGM's evidence gives reason to think that the vast majority of users' downloads are acts of infringement, and because well over 100 million copies of the software in question are known to have been downloaded, and billions of files are shared across the FastTrack and Gnutella networks each month, the probable scope of copyright infringement is staggering.

Grokster and StreamCast concede the infringement in most downloads, Brief for Respondents 10, n. 6, and it is uncontested that they are aware that users employ their software primarily to download copyrighted files, even if the decentralized FastTrack and Gnutella networks fail to reveal which files are being copied, and when. From time to time, moreover, the companies have learned about their users' infringement directly, as from users who have sent e-mail to each company with questions about playing copyrighted movies they had downloaded, to whom the companies have responded with guidance.^[6] App. 559-563, 808-816, 939-954. And MGM notified the companies of 8 million copyrighted files that could be obtained using their software.

Grokster and StreamCast are not, however, merely passive recipients of information about infringing use. The record is replete with evidence that from the moment Grokster [545 U.S. 924] and StreamCast began to distribute their free software, each one clearly voiced the objective that recipients use it to download copyrighted works, and each took active steps to encourage infringement.

After the notorious file-sharing service, Napster, was sued by copyright holders for facilitation of copyright infringement, A&M Records, Inc. v. Napster, Inc., 114 F. Supp. 2d 896 (ND Cal. 2000), aff'd in part, rev'd in part, 239 F. 3d 1004 (CA9 2001), StreamCast gave away a software program of a kind known as OpenNap, designed as compatible with the Napster program and open to Napster users for downloading files from other Napster and OpenNap users' computers. Evidence indicates that "[i]t was always [StreamCast's] intent to use [its OpenNap network] to be able to capture email addresses of [its] initial target market so that [it] could promote [its] StreamCast Morpheus interface to them," App. 861; indeed, the OpenNap program was engineered "`to leverage Napster's 50 million user base,'" id., at 746.

StreamCast monitored both the number of users downloading its OpenNap program and the number of music files they downloaded. Id., at 859, 863, 866. It also used the resulting OpenNap network to distribute copies of the Morpheus software and to encourage users to adopt it. Id., at 861, 867, 1039. Internal company documents indicate that StreamCast hoped to attract large numbers of former Napster users if that company was shut down by court order or otherwise, and that StreamCast planned to be the next Napster. Id., at 861. A kit developed by StreamCast to be delivered to advertisers, for example, contained press articles about StreamCast's potential to capture former Napster users, id., at 568-572, and it introduced itself to some potential advertisers as a company "which is similar to what Napster was," id., at 884. It broadcast banner advertisements to users of other Napster-compatible software, urging them to adopt its OpenNap. Id., at 586. An internal e-mail from a company executive stated: "`We have put this network in [545 U.S. 925] place so that when Napster pulls the plug on their free service . . . or if the Court orders them shut down prior to that . . . we will be positioned to capture the flood of their 32 million users that will be actively looking for an alternative.'" Id., at 588-589, 861.

Thus, StreamCast developed promotional materials to market its service as the best Napster alternative. One proposed advertisement read: "Napster Inc. has announced that it will soon begin charging you a fee. That's if the courts don't order it shut down first. What will you do to get around it?" Id., at 897. Another proposed ad touted StreamCast's software as the "#1 alternative to Napster" and asked "[w]hen the lights went off at Napster . . . where did the users go?" Id., at 836 (ellipsis in original).^[7] StreamCast even planned to flaunt the illegal uses of its software; when it launched the OpenNap network, the chief technology officer of the company averred that "[t]he goal is to get in trouble with the law and get sued. It's the best way to get in the new[s]." Id., at 916.

The evidence that Grokster sought to capture the market of former Napster users is sparser but revealing, for Grokster launched its own OpenNap system called Swaptor and inserted digital codes into its Web site so that computer users using Web search engines to look for "Napster" or "[f]ree file sharing" would be directed to the Grokster Web site, where they could download the Grokster software. Id., at 992-993. And Grokster's name is an apparent derivative of Napster.

StreamCast's executives monitored the number of songs by certain commercial artists available on their networks, and an internal communication indicates they aimed to have a larger number of copyrighted songs available on their networks [545 U.S. 926] than other file-sharing networks. Id., at 868. The point, of course, would be to attract users of a mind to infringe, just as it would be with their promotional materials developed showing copyrighted songs as examples of the kinds of files available through Morpheus. Id., at 848. Morpheus in fact allowed users to search specifically for "Top 40" songs, id., at 735, which were inevitably copyrighted. Similarly, Grokster sent users a newsletter promoting its ability to provide particular, popular copyrighted materials. Brief for Motion Picture Studio and Recording Company Petitioners 7-8.

In addition to this evidence of express promotion, marketing, and intent to promote further, the business models employed by Grokster and StreamCast confirm that their principal object was use of their software to download copyrighted works. Grokster and StreamCast receive no revenue from users, who obtain the software itself for nothing. Instead, both companies generate income by selling advertising space, and they stream the advertising to Grokster and Morpheus users while they are employing the programs. As the number of users of each program increases, advertising opportunities become worth more. Cf. App. 539, 804. While there is doubtless some demand for free Shakespeare, the evidence shows that substantive volume is a function of free access to copyrighted work. Users seeking Top 40 songs, for example, or the latest release by Modest Mouse, are certain to be far more numerous than those seeking a free Decameron, and Grokster and StreamCast translated that demand into dollars.

Finally, there is no evidence that either company made an effort to filter copyrighted material from users' downloads or otherwise impede the sharing of copyrighted files. Although Grokster appears to have sent e-mails warning users about infringing content when it received threatening notice from the copyright holders, it never blocked anyone from continuing to use its software to share copyrighted files. [545 U.S. 927] Id., at 75-76. StreamCast not only rejected another company's offer of help to monitor infringement, id., at 928-929, but blocked the Internet Protocol addresses of entities it believed were trying to engage in such monitoring on its networks, id., at 917-922.

After discovery, the parties on each side of the case crossmoved for summary judgment. The District Court limited its consideration to the asserted liability of Grokster and StreamCast for distributing the current versions of their software, leaving aside whether either was liable "for damages arising from past versions of their software, or from other past activities." 259 F. Supp. 2d 1029, 1033 (CD Cal. 2003). The District Court held that those who used the Grokster and Morpheus software to download copyrighted media files directly infringed MGM's copyrights, a conclusion not contested on appeal, but the court nonetheless granted summary judgment in favor of Grokster and StreamCast as to any liability arising from distribution of the then-current versions of their software. Distributing that software gave rise to no liability in the court's view, because its use did not provide the distributors with actual knowledge of specific acts of infringement. Case No. CV 01 08541 SVW (PJWx) (CD Cal., June 18, 2003), App. 1213.

The Court of Appeals affirmed. 380 F. 3d 1154 (CA9 2004). In the court's analysis, a defendant was liable as a contributory infringer when it had knowledge of direct infringement and materially contributed to the infringement. But the court read Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417 (1984), as holding that distribution of a commercial product capable of substantial noninfringing uses could not give rise to contributory liability for infringement unless the distributor had actual knowledge of specific instances of infringement and failed to act on that knowledge. The fact that the software was capable of substantial noninfringing uses in the Ninth Circuit's view meant [545 U.S. 928] that Grokster and StreamCast were not liable, because they had no such actual knowledge, owing to the decentralized architecture of their software. The court also held that Grokster and StreamCast did not materially contribute to their users' infringement because it was the users themselves who searched for, retrieved, and stored the infringing files, with no involvement by the defendants beyond providing the software in the first place.

The Ninth Circuit also considered whether Grokster and StreamCast could be liable under a theory of vicarious infringement. The court held against liability because the defendants did not monitor or control the use of the software, had no agreed-upon right or current ability to supervise its use, and had no independent duty to police infringement. We granted certiorari. 543 U. S. 1032 (2004).

MGM and many of the amici fault the Court of Appeals's holding for upsetting a sound balance between the respective values of supporting creative pursuits through copyright protection and promoting innovation in new communication technologies by limiting the incidence of liability for copyright infringement. The more artistic protection is favored, the more technological innovation may be discouraged; the administration of copyright law is an exercise in managing the tradeoff. See Sony Corp. v. Universal City Studios, supra, at 442; see generally Ginsburg, Copyright and Control Over New Technologies of Dissemination, 101 Colum. L. Rev. 1613 (2001); Lichtman & Landes, Indirect Liability for Copyright Infringement: An Economic Perspective, 16 Harv. J. L. & Tech. 395 (2003).

The tension between the two values is the subject of this case, with its claim that digital distribution of copyrighted material threatens copyright holders as never before, because every copy is identical to the original, copying is easy, [545 U.S. 929] and many people (especially the young) use file-sharing software to download copyrighted works. This very breadth of the software's use may well draw the public directly into the debate over copyright policy, Peters, Brace Memorial Lecture: Copyright Enters the Public Domain, 51 J. Copyright Soc. 701, 705-717 (2004) (address by Register of Copyrights), and the indications are that the ease of copying songs or movies using software like Grokster's and Napster's is fostering disdain for copyright protection, Wu, When Code Isn't Law, 89 Va. L. Rev. 679, 724-726 (2003). As the case has been presented to us, these fears are said to be offset by the different concern that imposing liability, not only on infringers but on distributors of software based on its potential for unlawful use, could limit further development of beneficial technologies. See, e. g., Lemley & Reese, Reducing Digital Copyright Infringement Without Restricting Innovation, 56 Stan. L. Rev. 1345, 1386-1390 (2004); Brief for Innovation Scholars and Economists as Amici Curiae 15-20; Brief for Emerging Technology Companies as Amici Curiae 19-25; Brief for Intel Corporation as Amicus Curiae 20-22.^[8]

The argument for imposing indirect liability in this case is, however, a powerful one, given the number of infringing downloads that occur every day using StreamCast's and Grokster's software. When a widely shared service or product is used to commit infringement, it may be impossible to [545 U.S. 930] enforce rights in the protected work effectively against all direct infringers, the only practical alternative being to go against the distributor of the copying device for secondary liability on a theory of contributory or vicarious infringement. See In re Aimster Copyright Litigation, 334 F. 3d 643, 645-646 (CA7 2003).

One infringes contributorily by intentionally inducing or encouraging direct infringement, see Gershwin Pub. Corp. v. Columbia Artists Management, Inc., 443 F. 2d 1159, 1162 (CA2 1971), and infringes vicariously by profiting from direct infringement while declining to exercise a right to stop or limit it, Shapiro, Bernstein & Co. v. H. L. Green Co., 316 F. 2d 304, 307 (CA2 1963).^[9] Although "[t]he Copyright Act does not expressly render anyone liable for infringement committed by another," Sony Corp. v. Universal City Studios, 464 U. S., at 434, these doctrines of secondary liability emerged from common law principles and are well established in the law, id., at 486 (Blackmun, J., dissenting); Kalem Co. v. Harper Brothers, 222 U. S. 55, 62-63 (1911); Gershwin Pub. Corp. v. Columbia Artists Management, [545 U.S. 931] supra, at 1162; 3 M. Nimmer & D. Nimmer, Copyright § 12.04[A] (2005).

Despite the currency of these principles of secondary liability, this Court has dealt with secondary copyright infringement in only one recent case, and because MGM has tailored its principal claim to our opinion there, a look at our earlier holding is in order. In Sony Corp. v. Universal City Studios, supra, this Court addressed a claim that secondary liability for infringement can arise from the very distribution of a commercial product. There, the product, novel at the time, was what we know today as the videocassette recorder or VCR. Copyright holders sued Sony as the manufacturer, claiming it was contributorily liable for infringement that occurred when VCR owners taped copyrighted programs because it supplied the means used to infringe, and it had constructive knowledge that infringement would occur. At the trial on the merits, the evidence showed that the principal use of the VCR was for "`time-shifting,'" or taping a program for later viewing at a more convenient time, which the Court found to be a fair, not an infringing, use. Id., at 423-424. There was no evidence that Sony had expressed an object of bringing about taping in violation of copyright or had taken active steps to increase its profits from unlawful taping. Id., at 438. Although Sony's advertisements urged consumers to buy the VCR to "`record favorite shows'" or "`build a library'" of recorded programs, id., at 459 (Blackmun, J., dissenting), neither of these uses was necessarily infringing, id., at 424, 454-455.

On those facts, with no evidence of stated or indicated intent to promote infringing uses, the only conceivable basis for imposing liability was on a theory of contributory infringement arising from its sale of VCRs to consumers with knowledge that some would use them to infringe. Id., at 439. But because the VCR was "capable of commercially significant noninfringing uses," we held the manufacturer [545 U.S. 932] could not be faulted solely on the basis of its distribution. Id., at 442.

This analysis reflected patent law's traditional staple article of commerce doctrine, now codified, that distribution of a component of a patented device will not violate the patent if it is suitable for use in other ways. 35 U. S. C. § 271(c); Aro Mfg. Co. v. Convertible Top Replacement Co., 377 U. S. 476, 485 (1964) (noting codification of cases); id., at 486, n. 6 (same). The doctrine was devised to identify instances in which it may be presumed from distribution of an article in commerce that the distributor intended the article to be used to infringe another's patent, and so may justly be held liable for that infringement. "One who makes and sells articles which are only adapted to be used in a patented combination will be presumed to intend the natural consequences of his acts; he will be presumed to intend that they shall be used in the combination of the patent." New York Scaffolding Co. v. Whitney, 224 F. 452, 459 (CA8 1915); see also James Heekin Co. v. Baker, 138 F. 63, 66 (CA8 1905); Canda v. Michigan Malleable Iron Co., 124 F. 486, 489 (CA6 1903); Thomson-Houston Electric Co. v. Ohio Brass Co., 80 F. 712, 720-721 (CA6 1897); Red Jacket Mfg. Co. v. Davis, 82 F. 432, 439 (CA7 1897); Holly v. Vergennes Machine Co., 4 F. 74, 82 (CC Vt. 1880); Renwick v. Pond, 20 F. Cas. 536, 541 (No. 11,702) (CC SDNY 1872).

In sum, where an article is "good for nothing else" but infringement, Canda v. Michigan Malleable Iron Co., supra, at 489, there is no legitimate public interest in its unlicensed availability, and there is no injustice in presuming or imputing an intent to infringe, see Henry v. A. B. Dick Co., 224 U. S. 1, 48 (1912), overruled on other grounds, Motion Picture Patents Co. v. Universal Film Mfg. Co., 243 U. S. 502 (1917). Conversely, the doctrine absolves the equivocal conduct of selling an item with substantial lawful as well as unlawful uses, and limits liability to instances of more acute [545 U.S. 933] fault than the mere understanding that some of one's products will be misused. It leaves breathing room for innovation and a vigorous commerce. See Sony Corp. v. Universal City Studios, 464 U. S., at 442; Dawson Chemical Co. v. Rohm & Haas Co., 448 U. S. 176, 221 (1980); Henry v. A. B. Dick Co., supra, at 48.

The parties and many of the amici in this case think the key to resolving it is the Sony rule and, in particular, what it means for a product to be "capable of commercially significant noninfringing uses." Sony Corp. v. Universal City Studios, supra, at 442. MGM advances the argument that granting summary judgment to Grokster and StreamCast as to their current activities gave too much weight to the value of innovative technology, and too little to the copyrights infringed by users of their software, given that 90% of works available on one of the networks was shown to be copyrighted. Assuming the remaining 10% to be its noninfringing use, MGM says this should not qualify as "substantial," and the Court should quantify Sony to the extent of holding that a product used "principally" for infringement does not qualify. See Brief for Motion Picture Studio and Recording Company Petitioners 31. As mentioned before, Grokster and StreamCast reply by citing evidence that their software can be used to reproduce public domain works, and they point to copyright holders who actually encourage copying. Even if infringement is the principal practice with their software today, they argue, the noninfringing uses are significant and will grow.

We agree with MGM that the Court of Appeals misapplied Sony, which it read as limiting secondary liability quite beyond the circumstances to which the case applied. Sony barred secondary liability based on presuming or imputing intent to cause infringement solely from the design or distribution of a product capable of substantial lawful use, which the distributor knows is in fact used for infringement. The [545 U.S. 934] Ninth Circuit has read Sony's limitation to mean that whenever a product is capable of substantial lawful use, the producer can never be held contributorily liable for third parties' infringing use of it; it read the rule as being this broad, even when an actual purpose to cause infringing use is shown by evidence independent of design and distribution of the product, unless the distributors had "specific knowledge of infringement at a time at which they contributed to the infringement, and failed to act upon that information." 380 F. 3d, at 1162 (internal quotation marks and brackets omitted). Because the Circuit found the StreamCast and Grokster software capable of substantial lawful use, it concluded on the basis of its reading of Sony that neither company could be held liable, since there was no showing that their software, being without any central server, afforded them knowledge of specific unlawful uses.

This view of Sony, however, was error, converting the case from one about liability resting on imputed intent to one about liability on any theory. Because Sony did not displace other theories of secondary liability, and because we find below that it was error to grant summary judgment to the companies on MGM's inducement claim, we do not revisit Sony further, as MGM requests, to add a more quantified description of the point of balance between protection and commerce when liability rests solely on distribution with knowledge that unlawful use will occur. It is enough to note that the Ninth Circuit's judgment rested on an erroneous understanding of Sony and to leave further consideration of the Sony rule for a day when that may be required.

Sony's rule limits imputing culpable intent as a matter of law from the characteristics or uses of a distributed product. But nothing in Sony requires courts to ignore evidence of intent if there is such evidence, and the case was never meant to foreclose rules of fault-based liability derived from [545 U.S. 935] the common law.^[10] Sony Corp. v. Universal City Studios, supra, at 439 ("If vicarious liability is to be imposed on Sony in this case, it must rest on the fact that it has sold equipment with constructive knowledge" of the potential for infringement). Thus, where evidence goes beyond a product's characteristics or the knowledge that it may be put to infringing uses, and shows statements or actions directed to promoting infringement, Sony's staple-article rule will not preclude liability.

The classic case of direct evidence of unlawful purpose occurs when one induces commission of infringement by another, or "entic[es] or persuad[es] another" to infringe, Black's Law Dictionary 790 (8th ed. 2004), as by advertising. Thus at common law a copyright or patent defendant who "not only expected but invoked [infringing use] by advertisement" was liable for infringement "on principles recognized in every part of the law." Kalem Co. v. Harper Brothers, 222 U. S., at 62-63 (copyright infringement). See also Henry v. A. B. Dick Co., 224 U. S., at 48-49 (contributory liability for patent infringement may be found where a good's "most conspicuous use is one which will coöperate in an infringement when sale to such user is invoked by advertisement" of the infringing use); Thomson-Houston Electric Co. v. Kelsey Electric R. Specialty Co., 75 F. 1005, 1007-1008 (CA2 1896) (relying on advertisements and displays to find defendant's "willingness . . . to aid other persons in any attempts which they may be disposed to make towards [patent] infringement"); Rumford Chemical Works v. Hecker, 20 F. Cas. 1342, 1346 (No. 12,133) (CC NJ 1876) (demonstrations of infringing activity along with "avowals of the [infringing] purpose and use for which it was made" supported liability for patent infringement).

[545 U.S. 936] The rule on inducement of infringement as developed in the early cases is no different today.^[11] Evidence of "active steps . . . taken to encourage direct infringement," Oak Industries, Inc. v. Zenith Electronics Corp., 697 F. Supp. 988, 992 (ND Ill. 1988), such as advertising an infringing use or instructing how to engage in an infringing use, show an affirmative intent that the product be used to infringe, and a showing that infringement was encouraged overcomes the law's reluctance to find liability when a defendant merely sells a commercial product suitable for some lawful use, see, e. g., Water Technologies Corp. v. Calco, Ltd., 850 F. 2d 660, 668 (CA Fed. 1988) (liability for inducement where one "actively and knowingly aid[s] and abet[s] another's direct infringement" (emphasis deleted)); Fromberg, Inc. v. Thornhill, 315 F. 2d 407, 412-413 (CA5 1963) (demonstrations by sales staff of infringing uses supported liability for inducement); Haworth Inc. v. Herman Miller Inc., 37 USPQ 2d 1080, 1090 (WD Mich. 1994) (evidence that defendant "demonstrate[d] and recommend[ed] infringing configurations" of its product could support inducement liability); Sims v. Mack Trucks, Inc., 459 F. Supp. 1198, 1215 (ED Pa. 1978) (finding inducement where the use "depicted by the defendant in its promotional film and brochures infringes the . . . patent"), overruled on other grounds, 608 F. 2d 87 (CA3 1979). Cf. W. Keeton, D. Dobbs, R. Keeton, & D. Owen, Prosser and Keeton on Law of Torts 37 (5th ed. 1984) ("There is a definite tendency to impose greater responsibility upon a defendant whose conduct was intended to do harm, or was morally wrong").

For the same reasons that Sony took the staple-article doctrine of patent law as a model for its copyright safe-harbor rule, the inducement rule, too, is a sensible one for copyright. We adopt it here, holding that one who distributes a device with the object of promoting its use to infringe copyright, as [545 U.S. 937] shown by clear expression or other affirmative steps taken to foster infringement, is liable for the resulting acts of infringement by third parties. We are, of course, mindful of the need to keep from trenching on regular commerce or discouraging the development of technologies with lawful and unlawful potential. Accordingly, just as Sony did not find intentional inducement despite the knowledge of the VCR manufacturer that its device could be used to infringe, 464 U. S., at 439, n. 19, mere knowledge of infringing potential or of actual infringing uses would not be enough here to subject a distributor to liability. Nor would ordinary acts incident to product distribution, such as offering customers technical support or product updates, support liability in themselves. The inducement rule, instead, premises liability on purposeful, culpable expression and conduct, and thus does nothing to compromise legitimate commerce or discourage innovation having a lawful promise.

The only apparent question about treating MGM's evidence as sufficient to withstand summary judgment under the theory of inducement goes to the need on MGM's part to adduce evidence that StreamCast and Grokster communicated an inducing message to their software users. The classic instance of inducement is by advertisement or solicitation that broadcasts a message designed to stimulate others to commit violations. MGM claims that such a message is shown here. It is undisputed that StreamCast beamed onto the computer screens of users of Napster-compatible programs ads urging the adoption of its OpenNap program, which was designed, as its name implied, to invite the custom of patrons of Napster, then under attack in the courts for facilitating massive infringement. Those who accepted StreamCast's OpenNap program were offered software to perform the same services, which a factfinder could conclude [545 U.S. 938] would readily have been understood in the Napster market as the ability to download copyrighted music files. Grokster distributed an electronic newsletter containing links to articles promoting its software's ability to access popular copyrighted music. And anyone whose Napster or free file-sharing searches turned up a link to Grokster would have understood Grokster to be offering the same file-sharing ability as Napster, and to the same people who probably used Napster for infringing downloads; that would also have been the understanding of anyone offered Grokster's suggestively named Swaptor software, its version of OpenNap. And both companies communicated a clear message by responding affirmatively to requests for help in locating and playing copyrighted materials.

In StreamCast's case, of course, the evidence just described was supplemented by other unequivocal indications of unlawful purpose in the internal communications and advertising designs aimed at Napster users ("When the lights went off at Napster . . . where did the users go?" App. 836 (ellipsis in original)). Whether the messages were communicated is not to the point on this record. The function of the message in the theory of inducement is to prove by a defendant's own statements that his unlawful purpose disqualifies him from claiming protection (and incidentally to point to actual violators likely to be found among those who hear or read the message). See supra, at 935-937. Proving that a message was sent out, then, is the preeminent but not exclusive way of showing that active steps were taken with the purpose of bringing about infringing acts, and of showing that infringing acts took place by using the device distributed. Here, the summary judgment record is replete with other evidence that Grokster and StreamCast, unlike the manufacturer and distributor in Sony, acted with a purpose to cause copyright violations by use of software suitable for illegal use. See supra, at 924-927.

[545 U.S. 939] Three features of this evidence of intent are particularly notable. First, each company showed itself to be aiming to satisfy a known source of demand for copyright infringement, the market comprising former Napster users. StreamCast's internal documents made constant reference to Napster, it initially distributed its Morpheus software through an OpenNap program compatible with Napster, it advertised its OpenNap program to Napster users, and its Morpheus software functions as Napster did except that it could be used to distribute more kinds of files, including copyrighted movies and software programs. Grokster's name is apparently derived from Napster, it too initially offered an OpenNap program, its software's function is likewise comparable to Napster's, and it attempted to divert queries for Napster onto its own Web site. Grokster and StreamCast's efforts to supply services to former Napster users, deprived of a mechanism to copy and distribute what were overwhelmingly infringing files, indicate a principal, if not exclusive, intent on the part of each to bring about infringement.

Second, this evidence of unlawful objective is given added significance by MGM's showing that neither company attempted to develop filtering tools or other mechanisms to diminish the infringing activity using their software. While the Ninth Circuit treated the defendants' failure to develop such tools as irrelevant because they lacked an independent duty to monitor their users' activity, we think this evidence underscores Grokster's and StreamCast's intentional facilitation of their users' infringement.^[12]

Third, there is a further complement to the direct evidence of unlawful objective. It is useful to recall that StreamCast [545 U.S. 940] and Grokster make money by selling advertising space, by directing ads to the screens of computers employing their software. As the record shows, the more the software is used, the more ads are sent out and the greater the advertising revenue becomes. Since the extent of the software's use determines the gain to the distributors, the commercial sense of their enterprise turns on high-volume use, which the record shows is infringing.^[13] This evidence alone would not justify an inference of unlawful intent, but viewed in the context of the entire record its import is clear.

The unlawful objective is unmistakable.

In addition to intent to bring about infringement and distribution of a device suitable for infringing use, the inducement theory of course requires evidence of actual infringement by recipients of the device, the software in this case. As the account of the facts indicates, there is evidence of infringement on a gigantic scale, and there is no serious issue of the adequacy of MGM's showing on this point in order to survive the companies' summary judgment requests. Although [545 U.S. 941] an exact calculation of infringing use, as a basis for a claim of damages, is subject to dispute, there is no question that the summary judgment evidence is at least adequate to entitle MGM to go forward with claims for damages and equitable relief.

* * *

In sum, this case is significantly different from Sony and reliance on that case to rule in favor of StreamCast and Grokster was error. Sony dealt with a claim of liability based solely on distributing a product with alternative lawful and unlawful uses, with knowledge that some users would follow the unlawful course. The case struck a balance between the interests of protection and innovation by holding that the product's capability of substantial lawful employment should bar the imputation of fault and consequent secondary liability for the unlawful acts of others.

MGM's evidence in this case most obviously addresses a different basis of liability for distributing a product open to alternative uses. Here, evidence of the distributors' words and deeds going beyond distribution as such shows a purpose to cause and profit from third-party acts of copyright infringement. If liability for inducing infringement is ultimately found, it will not be on the basis of presuming or imputing fault, but from inferring a patently illegal objective from statements and actions showing what that objective was.

There is substantial evidence in MGM's favor on all elements of inducement, and summary judgment in favor of Grokster and StreamCast was error. On remand, reconsideration of MGM's motion for summary judgment will be in order.

The judgment of the Court of Appeals is vacated, and the case is remanded for further proceedings consistent with this opinion.

It is so ordered.

[545 U.S. 942] JUSTICE GINSBURG, with whom THE CHIEF JUSTICE and JUSTICE KENNEDY join, concurring.

I concur in the Court's decision, which vacates in full the judgment of the Court of Appeals for the Ninth Circuit, ante, at 941, and write separately to clarify why I conclude that the Court of Appeals misperceived, and hence misapplied, our holding in Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417 (1984). There is here at least a "genuine issue as to [a] material fact," Fed. Rule Civ. Proc. 56(c), on the liability of Grokster or StreamCast, not only for actively inducing copyright infringement, but also, or alternatively, based on the distribution of their software products, for contributory copyright infringement. On neither score was summary judgment for Grokster and StreamCast warranted.

At bottom, however labeled, the question in this case is whether Grokster and StreamCast are liable for the direct infringing acts of others. Liability under our jurisprudence may be predicated on actively encouraging (or inducing) infringement through specific acts (as the Court's opinion develops) or on distributing a product distributees use to infringe copyrights, if the product is not capable of "substantial" or "commercially significant" noninfringing uses. Sony, 464 U. S., at 442; see also 3 M. Nimmer & D. Nimmer, Nimmer on Copyright § 12.04[A][2] (2005). While the two categories overlap, they capture different culpable behavior. Long coexisting, both are now codified in patent law. Compare 35 U. S. C. § 271(b) (active inducement liability) with § 271(c) (contributory liability for distribution of a product not "suitable for substantial noninfringing use").

In Sony, 464 U. S. 417, the Court considered Sony's liability for selling the Betamax videocassette recorder. It did so enlightened by a full trial record. Drawing an analogy to the staple article of commerce doctrine from patent law, [545 U.S. 943] the Sony Court observed that the "sale of an article . . . adapted to [a patent] infringing use" does not suffice "to make the seller a contributory infringer" if the article "is also adapted to other and lawful uses." Id., at 441 (quoting Henry v. A. B. Dick Co., 224 U. S. 1, 48 (1912), overruled on other grounds, Motion Picture Patents Co. v. Universal Film Mfg. Co., 243 U. S. 502, 517 (1917)).

"The staple article of commerce doctrine" applied to copyright, the Court stated, "must strike a balance between a copyright holder's legitimate demand for effective—not merely symbolic—protection of the statutory monopoly, and the rights of others freely to engage in substantially unrelated areas of commerce." Sony, 464 U. S., at 442. "Accordingly," the Court held, "the sale of copying equipment, like the sale of other articles of commerce, does not constitute contributory infringement if the product is widely used for legitimate, unobjectionable purposes. Indeed, it need merely be capable of substantial noninfringing uses." Ibid. Thus, to resolve the Sony case, the Court explained, it had to determine "whether the Betamax is capable of commercially significant noninfringing uses." Ibid.

To answer that question, the Court considered whether "a significant number of [potential uses of the Betamax were] noninfringing." Ibid. The Court homed in on one potential use—private, noncommercial time-shifting of television programs in the home (i. e., recording a broadcast TV program for later personal viewing). Time-shifting was noninfringing, the Court concluded, because in some cases trial testimony showed it was authorized by the copyright holder, id., at 443-447, and in others it qualified as legitimate fair use, id., at 447-455. Most purchasers used the Betamax principally to engage in time-shifting, id., at 421, 423, a use that "plainly satisfie[d]" the Court's standard, id., at 442. Thus, there was no need in Sony to "give precise content to the question of how much [actual or potential] use is commercially [545 U.S. 944] significant." Ibid.^[14] Further development was left for later days and cases.

The Ninth Circuit went astray, I will endeavor to explain, when that court granted summary judgment to Grokster and StreamCast on the charge of contributory liability based on distribution of their software products. Relying on its earlier opinion in A&M Records, Inc. v. Napster, Inc., 239 F. 3d 1004 (CA9 2001), the Court of Appeals held that "if substantial noninfringing use was shown, the copyright owner would be required to show that the defendant had reasonable knowledge of specific infringing files." 380 F. 3d 1154, 1161 (CA9 2004). "A careful examination of the record," the [545 U.S. 945] court concluded, "indicates that there is no genuine issue of material fact as to noninfringing use." Ibid. The appeals court pointed to the band Wilco, which made one of its albums available for free downloading, to other recording artists who may have authorized free distribution of their music through the Internet, and to public domain literary works and films available through Grokster's and StreamCast's software. Ibid. Although it acknowledged petitioners' (hereinafter MGM) assertion that "the vast majority of the software use is for copyright infringement," the court concluded that Grokster's and StreamCast's proffered evidence met Sony's requirement that "a product need only be capable of substantial noninfringing uses." 380 F. 3d, at 1162.^[15]

This case differs markedly from Sony. Cf. Peters, Brace Memorial Lecture: Copyright Enters the Public Domain, 51 J. Copyright Soc. 701, 724 (2004) ("The Grokster panel's reading of Sony is the broadest that any court has given it . . . ."). Here, there has been no finding of any fair use and little beyond anecdotal evidence of noninfringing uses. In finding the Grokster and StreamCast software products capable of substantial noninfringing uses, the District Court and the Court of Appeals appear to have relied largely on declarations submitted by the defendants. These declarations include assertions (some of them hearsay) that a number of copyright owners authorize distribution of their works on the Internet and that some public domain material is available through peer-to-peer networks including those accessed through Grokster's and StreamCast's software. 380 F. 3d, at 1161; 259 F. Supp. 2d 1029, 1035-1036 (CD Cal. 2003); App. 125-171.

[545 U.S. 946] The District Court declared it "undisputed that there are substantial noninfringing uses for Defendants' software," thus obviating the need for further proceedings. 259 F. Supp. 2d, at 1035. This conclusion appears to rest almost entirely on the collection of declarations submitted by Grokster and StreamCast. Ibid. Review of these declarations reveals mostly anecdotal evidence, sometimes obtained secondhand, of authorized copyrighted works or public domain works available online and shared through peer-to-peer networks, and general statements about the benefits of peer-to-peer technology. See, e. g., Decl. of Janis Ian ¶ 13, App. 128 ("P2P technologies offer musicians an alternative channel for promotion and distribution."); Decl. of Gregory Newby ¶ 12, id., at 136 ("Numerous authorized and public domain Project Gutenberg eBooks are made available on Morpheus, Kazaa, Gnutella, Grokster, and similar software products."); Decl. of Aram Sinnreich ¶ 6, id., at 151 ("file sharing seems to have a net positive impact on music sales"); Decl. of John Busher ¶ 8, id., at 166 ("I estimate that Acoustica generates sales of between $1,000 and $10,000 per month as a result of the distribution of its trialware software through the Gnutella and FastTrack Networks."); Decl. of Patricia D. Hoekman ¶¶ 3-4, id., at 169-170 (search on Morpheus for "President Bush speeches" found several video recordings, searches for "Declaration of Independence" and "Bible" found various documents and declarant was able to download a copy of the Declaration); Decl. of Sean L. Mayers ¶ 11, id., at 67 ("Existing open, decentralized peer-to-peer file-sharing networks . . . offer content owners distinct business advantages over alternate online distribution technologies."). Compare Decl. of Brewster Kahle ¶ 20, id., at 142 ("Those who download the Prelinger films . . . are entitled to redistribute those files, and the Archive welcomes their redistribution by the Morpheus-Grokster-KaZaa community of users."), with Deposition of Brewster Kahle (Sept. 18, [545 U.S. 947] 2002), id., at 396-403 (testifying that he has no knowledge of any person downloading a Prelinger film using Morpheus, Grokster, or KaZaA). Compare also Decl. of Richard Prelinger ¶ 17, id., at 147 ("[W]e welcome further redistribution of the Prelinger films . . . by individuals using peer-to-peer software products like Morpheus, KaZaA and Grokster."), with Deposition of Richard Prelinger (Oct. 1, 2002), id., at 410-411 ("Q. What is your understanding of Grokster? A. I have no understanding of Grokster. . . . Q. Do you know whether any user of the Grokster software has made available to share any Prelinger film? A. No."). See also Deposition of Aram Sinnreich (Sept. 25, 2002), id., at 390 (testimony about the band Wilco based on "[t]he press and industry news groups and scuttlebutt."). These declarations do not support summary judgment in the face of evidence, proffered by MGM, of overwhelming use of Grokster's and StreamCast's software for infringement.^[16]

[545 U.S. 948] Even if the absolute number of noninfringing files copied using the Grokster and StreamCast software is large, it does not follow that the products are therefore put to substantial noninfringing uses and are thus immune from liability. The number of noninfringing copies may be reflective of, and dwarfed by, the huge total volume of files shared. Further, the District Court and the Court of Appeals did not sharply distinguish between uses of Grokster's and StreamCast's software products (which this case is about) and uses of peer-to-peer technology generally (which this case is not about).

In sum, when the record in this case was developed, there was evidence that Grokster's and StreamCast's products were, and had been for some time, overwhelmingly used to infringe, ante, at 922-924; App. 434-439, 476-481, and that this infringement was the overwhelming source of revenue from the products, ante, at 925-926; 259 F. Supp. 2d, at 1043-1044. Fairly appraised, the evidence was insufficient to demonstrate, beyond genuine debate, a reasonable prospect that substantial or commercially significant noninfringing uses were likely to develop over time. On this record, the District Court should not have ruled dispositively on the contributory infringement charge by granting summary judgment to Grokster and StreamCast.^[17]

If, on remand, the case is not resolved on summary judgment in favor of MGM based on Grokster and StreamCast actively inducing infringement, the Court of Appeals, I [545 U.S. 949] would emphasize, should reconsider, on a fuller record, its interpretation of Sony's product distribution holding.

---------------

JUSTICE BREYER, with whom JUSTICE STEVENS and JUSTICE O'CONNOR join, concurring.

I agree with the Court that the distributor of a dual-use technology may be liable for the infringing activities of third parties where he or she actively seeks to advance the infringement. Ante, at 919. I further agree that, in light of our holding today, we need not now "revisit" Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417 (1984). Ante, at 934. Other Members of the Court, however, take up the Sony question: whether Grokster's product is "capable of `substantial' or `commercially significant' noninfringing uses." Ante, at 942 (GINSBURG, J., concurring) (quoting Sony, supra, at 442). And they answer that question by stating that the Court of Appeals was wrong when it granted summary judgment on the issue in Grokster's favor. Ante, at 944. I write to explain why I disagree with them on this matter.

The Court's opinion in Sony and the record evidence (as described and analyzed in the many briefs before us) together convince me that the Court of Appeals' conclusion has adequate legal support.

I begin with Sony's standard. In Sony, the Court considered the potential copyright liability of a company that did not itself illegally copy protected material, but rather sold a machine—a videocassette recorder (VCR)—that could be used to do so. A buyer could use that machine for non-infringing purposes, such as recording for later viewing (sometimes called "`time-shifting,'" Sony, 464 U. S., at 421) uncopyrighted television programs or copyrighted programs with a copyright holder's permission. The buyer could use [545 U.S. 950] the machine for infringing purposes as well, such as building libraries of taped copyrighted programs. Or, the buyer might use the machine to record copyrighted programs under circumstances in which the legal status of the act of recording was uncertain (i. e., where the copying may, or may not, have constituted a "fair use," id., at 425-426). Sony knew many customers would use its VCRs to engage in unauthorized copying and "`library-building.'" Id., at 458-459 (Blackmun, J., dissenting). But that fact, said the Court, was insufficient to make Sony itself an infringer. And the Court ultimately held that Sony was not liable for its customers' acts of infringement.

In reaching this conclusion, the Court recognized the need for the law, in fixing secondary copyright liability, to "strike a balance between a copyright holder's legitimate demand for effective—not merely symbolic—protection of the statutory monopoly, and the rights of others freely to engage in substantially unrelated areas of commerce." Id., at 442. It pointed to patent law's "staple article of commerce" doctrine, ibid., under which a distributor of a product is not liable for patent infringement by its customers unless that product is "unsuited for any commercial noninfringing use." Dawson Chemical Co. v. Rohm & Haas Co., 448 U. S. 176, 198 (1980). The Court wrote that the sale of copying equipment, "like the sale of other articles of commerce, does not constitute contributory infringement if the product is widely used for legitimate, unobjectionable purposes. Indeed, it need merely be capable of substantial noninfringing uses." Sony, 464 U. S., at 442 (emphasis added). The Court ultimately characterized the legal "question" in the particular case as "whether [Sony's VCR] is capable of commercially significant noninfringing uses" (while declining to give "precise content" to these terms). Ibid. (emphasis added).

It then applied this standard. The Court had before it a survey (commissioned by the District Court and then prepared by the respondents) showing that roughly 9% of all [545 U.S. 951] VCR recordings were of the type—namely, religious, educational, and sports programming—owned by producers and distributors testifying on Sony's behalf who did not object to time-shifting. See Brief for Respondents, O. T. 1983, No. 81-1687, pp. 52-53; see also Sony, supra, at 424 (7.3% of all Sony VCR use is to record sports programs; representatives of the sports leagues do not object). A much higher percentage of VCR users had at one point taped an authorized program, in addition to taping unauthorized programs. And the plaintiffs—not a large class of content providers as in this case—owned only a small percentage of the total available unauthorized programming. See ante, at 947, n. 3 (GINSBURG, J., concurring). But of all the taping actually done by Sony's customers, only around 9% was of the sort the Court referred to as authorized.

The Court found that the magnitude of authorized programming was "significant," and it also noted the "significant potential for future authorized copying." 464 U. S., at 444. The Court supported this conclusion by referencing the trial testimony of professional sports league officials and a religious broadcasting representative. Id., at 444, and n. 24. It also discussed (1) a Los Angeles educational station affiliated with the Public Broadcasting Service that made many of its programs available for home taping, and (2) Mr. Rogers' Neighborhood, a widely watched children's program. Id., at 445. On the basis of this testimony and other similar evidence, the Court determined that producers of this kind had authorized duplication of their copyrighted programs "in significant enough numbers to create a substantial market for a noninfringing use of the" VCR. Id., at 447, n. 28 (emphasis added).

The Court, in using the key word "substantial," indicated that these circumstances alone constituted a sufficient basis for rejecting the imposition of secondary liability. See id., at 456 ("Sony demonstrated a significant likelihood that substantial numbers of copyright holders" would not object [545 U.S. 952] to time-shifting (emphasis added)). Nonetheless, the Court buttressed its conclusion by finding separately that, in any event, un-authorized time-shifting often constituted not infringement, but "fair use." Id., at 447-456.

When measured against Sony's underlying evidence and analysis, the evidence now before us shows that Grokster passes Sony's test—that is, whether the company's product is capable of substantial or commercially significant noninfringing uses. Id., at 442. For one thing, petitioners' (hereinafter MGM) own expert declared that 75% of current files available on Grokster are infringing and 15% are "likely infringing." See App. 436-439, ¶¶ 6-17 (Decl. of Dr. Ingram Olkin); cf. ante, at 922 (opinion of the Court). That leaves some number of files near 10% that apparently are noninfringing, a figure very similar to the 9% or so of authorized time-shifting uses of the VCR that the Court faced in Sony.

As in Sony, witnesses here explained the nature of the noninfringing files on Grokster's network without detailed quantification. Those files include:

—Authorized copies of music by artists such as Wilco, Janis Ian, Pearl Jam, Dave Matthews, John Mayer, and others. See App. 152-153, ¶¶ 9-13 (Decl. of Aram Sinnreich) (Wilco's "lesson has already been adopted by artists still signed to their major labels"); id., at 170, ¶¶ 5-7 (Decl. of Patricia D. Hoekman) (locating "numerous audio recordings" that were authorized for swapping); id., at 74, ¶ 10 (Decl. of Daniel B. Rung) (describing Grokster's partnership with a company that hosts music from thousands of independent artists)

—Free electronic books and other works from various online publishers, including Project Gutenberg. See id., at 136, ¶ 12 (Decl. of Gregory Newby) ("Numerous authorized and public domain Project Gutenberg eBooks are made available" on Grokster. Project Gutenberg "welcomes this widespread [545 U.S. 953] sharing . . . using these software products[,] since they assist us in meeting our objectives"); id., at 159-160, ¶ 32 (Decl. of Sinnreich)

—Public domain and authorized software, such as WinZip 8.1. Id., at 170, ¶ 8 (Decl. of Hoekman); id., at 165, ¶¶ 4-7 (Decl. of John Busher)

—Licensed music videos and television and movie segments distributed via digital video packaging with the permission of the copyright holder. Id., at 70, ¶ 24 (Decl. of Sean L. Mayers).

The nature of these and other lawfully swapped files is such that it is reasonable to infer quantities of current lawful use roughly approximate to those at issue in Sony. At least, MGM has offered no evidence sufficient to survive summary judgment that could plausibly demonstrate a significant quantitative difference. See ante, at 922 (opinion of the Court); see also Brief for Motion Picture Studio and Recording Company Petitioners i (referring to "at least 90% of the total use of the services"); but see ante, at 947, n. 3 (GINSBURG, J., concurring). To be sure, in quantitative terms these uses account for only a small percentage of the total number of uses of Grokster's product. But the same was true in Sony, which characterized the relatively limited authorized copying market as "substantial." (The Court made clear as well in Sony that the amount of material then presently available for lawful copying—if not actually copied— was significant, see 464 U. S., at 444, and the same is certainly true in this case.)

Importantly, Sony also used the word "capable," asking whether the product is "capable of" substantial noninfringing uses. Its language and analysis suggest that a figure like 10%, if fixed for all time, might well prove insufficient, but that such a figure serves as an adequate foundation where there is a reasonable prospect of expanded legitimate uses over time. See ibid. (noting a "significant potential for future authorized copying"). And its language also indicates [545 U.S. 954] the appropriateness of looking to potential future uses of the product to determine its "capability."

Here the record reveals a significant future market for noninfringing uses of Grokster-type peer-to-peer software. Such software permits the exchange of any sort of digital file—whether that file does, or does not, contain copyrighted material. As more and more uncopyrighted information is stored in swappable form, it seems a likely inference that lawful peer-to-peer sharing will become increasingly prevalent. See, e. g., App. 142, ¶ 20 (Decl. of Brewster Kahle) ("[T]he [Internet Archive] welcomes [the] redistribution [of authorized films] by the Morpheus-Grokster-KaZaa community of users"); id., at 166, ¶ 8 (Decl. of Busher) (sales figures of $1,000 to $10,000 per month through peer-to-peer networks "will increase in the future as Acoustica's trialware is more widely distributed through these networks"); id., at 156-163, ¶¶ 21-40 (Decl. of Sinnreich).

And that is just what is happening. Such legitimate noninfringing uses are coming to include the swapping of: research information (the initial purpose of many peer-to-peer networks); public domain films (e. g., those owned by the Prelinger Archive); historical recordings and digital educational materials (e. g., those stored on the Internet Archive); digital photos (OurPictures, for example, is starting a P2P photo-swapping service); "shareware" and "freeware" (e. g., Linux and certain Windows software); secure licensed music and movie files (Intent MediaWorks, for example, protects licensed content sent across P2P networks); news broadcasts past and present (the BBC Creative Archive lets users "rip, mix and share the BBC"); user-created audio and video files (including "podcasts" that may be distributed through P2P software); and all manner of free "open content" works collected by Creative Commons (one can search for Creative Commons material on StreamCast). See Brief for Distributed Computing Industry Association as Amicus Curiae 15-26; Merges, A New Dynamism in the Public Domain, 71 [545 U.S. 955] U. Chi. L. Rev. 183 (2004). I can find nothing in the record that suggests that this course of events will not continue to flow naturally as a consequence of the character of the software taken together with the foreseeable development of the Internet and of information technology. Cf. ante, at 920 (opinion of the Court) (discussing the significant benefits of peer-to-peer technology).

There may be other now-unforeseen noninfringing uses that develop for peer-to-peer software, just as the homevideo rental industry (unmentioned in Sony) developed for the VCR. But the foreseeable development of such uses, when taken together with an estimated 10% noninfringing material, is sufficient to meet Sony's standard. And while Sony considered the record following a trial, there are no facts asserted by MGM in its summary judgment filings that lead me to believe the outcome after a trial here could be any different. The lower courts reached the same conclusion.

Of course, Grokster itself may not want to develop these other noninfringing uses. But Sony's standard seeks to protect not the Groksters of this world (which in any event may well be liable under today's holding), but the development of technology more generally. And Grokster's desires in this respect are beside the point.

The real question here, I believe, is not whether the record evidence satisfies Sony. As I have interpreted the standard set forth in that case, it does. And of the Courts of Appeals that have considered the matter, only one has proposed interpreting Sony more strictly than I would do—in a case where the product might have failed under any standard. In re Aimster Copyright Litigation, 334 F. 3d 643, 653 (CA7 2003) (defendant "failed to show that its service is ever used for any purpose other than to infringe" copyrights (emphasis added)); see Matthew Bender & Co. v. West Pub. Co., 158 [545 U.S. 956] F. 3d 693, 706-707 (CA2 1998) (court did not require that noninfringing uses be "predominant," it merely found that they were predominant, and therefore provided no analysis of Sony's boundaries); but see ante, at 944, n. 1 (GINSBURG, J., concurring); see also A&M Records, Inc. v. Napster, Inc., 239 F. 3d 1004, 1020 (CA9 2001) (discussing Sony); Cable/Home Communication Corp. v. Network Productions, Inc., 902 F. 2d 829, 842-847 (CA11 1990) (same); Vault Corp. v. Quaid Software, Ltd., 847 F. 2d 255, 262 (CA5 1988) (same); cf. Dynacore Holdings Corp. v. U. S. Philips Corp., 363 F. 3d 1263, 1275 (CA Fed. 2004) (same); see also Doe v. GTE Corp., 347 F. 3d 655, 661 (CA7 2003) ("A person may be liable as a contributory infringer if the product or service it sells has no (or only slight) legal use").

Instead, the real question is whether we should modify the Sony standard, as MGM requests, or interpret Sony more strictly, as I believe JUSTICE GINSBURG'S approach would do in practice. Compare ante, at 944-948 (concurring opinion) (insufficient evidence in this case of both present lawful uses and of a reasonable prospect that substantial noninfringing uses would develop over time), with Sony, 464 U. S., at 442-447 (basing conclusion as to the likely existence of a substantial market for authorized copying upon general declarations, some survey data, and common sense).

As I have said, Sony itself sought to "strike a balance between a copyright holder's legitimate demand for effective— not merely symbolic—protection of the statutory monopoly, and the rights of others freely to engage in substantially unrelated areas of commerce." Id., at 442. Thus, to determine whether modification, or a strict interpretation, of Sony is needed, I would ask whether MGM has shown that Sony incorrectly balanced copyright and new-technology interests. In particular: (1) Has Sony (as I interpret it) worked to protect new technology? (2) If so, would modification or strict interpretation significantly weaken that protection? (3) If [545 U.S. 957] so, would new or necessary copyright-related benefits outweigh any such weakening?

The first question is the easiest to answer. Sony's rule, as I interpret it, has provided entrepreneurs with needed assurance that they will be shielded from copyright liability as they bring valuable new technologies to market.

Sony's rule is clear. That clarity allows those who develop new products that are capable of substantial noninfringing uses to know, ex ante, that distribution of their product will not yield massive monetary liability. At the same time, it helps deter them from distributing products that have no other real function than—or that are specifically intended for—copyright infringement, deterrence that the Court's holding today reinforces (by adding a weapon to the copyright holder's legal arsenal).

Sony's rule is strongly technology protecting. The rule deliberately makes it difficult for courts to find secondary liability where new technology is at issue. It establishes that the law will not impose copyright liability upon the distributors of dual-use technologies (who do not themselves engage in unauthorized copying) unless the product in question will be used almost exclusively to infringe copyrights (or unless they actively induce infringements as we today describe). Sony thereby recognizes that the copyright laws are not intended to discourage or to control the emergence of new technologies, including (perhaps especially) those that help disseminate information and ideas more broadly or more efficiently. Thus Sony's rule shelters VCRs, typewriters, tape recorders, photocopiers, computers, cassette players, compact disc burners, digital video recorders, MP3 players, Internet search engines, and peer-to-peer software. But Sony's rule does not shelter descramblers, even if one could theoretically use a descrambler in a noninfringing way. 464 [545 U.S. 958] U. S., at 441-442. Compare Cable/Home Communication Corp., supra, at 837-850 (developer liable for advertising television signal descrambler), with Vault Corp., supra, at 262 (primary use infringing but a substantial noninfringing use).

Sony's rule is forward looking. It does not confine its scope to a static snapshot of a product's current uses (thereby threatening technologies that have undeveloped future markets). Rather, as the VCR example makes clear, a product's market can evolve dramatically over time. And Sony—by referring to a capacity for substantial noninfringing uses—recognizes that fact. Sony's word "capable" refers to a plausible, not simply a theoretical, likelihood that such uses will come to pass, and that fact anchors Sony in practical reality. Cf. Aimster, 334 F. 3d, at 651.

Sony's rule is mindful of the limitations facing judges where matters of technology are concerned. Judges have no specialized technical ability to answer questions about present or future technological feasibilility or commercial viability where technology professionals, engineers, and venture capitalists themselves may radically disagree and where answers may differ depending upon whether one focuses upon the time of product development or the time of distribution. Consider, for example, the question whether devices can be added to Grokster's software that will filter out infringing files. MGM tells us this is easy enough to do, as do several amici that produce and sell the filtering technology. See, e. g., Brief for Motion Picture Studio and Recording Company Petitioners 11; Brief for Audible Magic Corp. et al. as Amici Curiae 3-10. Grokster says it is not at all easy to do, and not an efficient solution in any event, and several apparently disinterested computer science professors agree. See Brief for Respondents 31; Brief for Computer Science Professor Harold Abelson et al. as Amici Curiae 6-10, 14-18. Which account should a judge credit? Sony says that the judge will not necessarily have to decide.

[545 U.S. 959] Given the nature of the Sony rule, it is not surprising that in the last 20 years, there have been relatively few contributory infringement suits—based on a product distribution theory—brought against technology providers (a small handful of federal appellate court cases and perhaps fewer than two dozen District Court cases in the last 20 years). I have found nothing in the briefs or the record that shows that Sony has failed to achieve its innovation-protecting objective.

The second, more difficult, question is whether a modified Sony rule (or a strict interpretation) would significantly weaken the law's ability to protect new technology. JUSTICE GINSBURG'S approach would require defendants to produce considerably more concrete evidence—more than was presented here—to earn Sony's shelter. That heavier evidentiary demand, and especially the more dramatic (case-by-case balancing) modifications that MGM and the Government seek, would, I believe, undercut the protection that Sony now offers.

To require defendants to provide, for example, detailed evidence—say, business plans, profitability estimates, projected technological modifications, and so forth—would doubtless make life easier for copyright holder plaintiffs. But it would simultaneously increase the legal uncertainty that surrounds the creation or development of a new technology capable of being put to infringing uses. Inventors and entrepreneurs (in the garage, the dorm room, the corporate lab, or the boardroom) would have to fear (and in many cases endure) costly and extensive trials when they create, produce, or distribute the sort of information technology that can be used for copyright infringement. They would often be left guessing as to how a court, upon later review of the product and its uses, would decide when necessarily rough estimates amounted to sufficient evidence. They would have no way to predict how courts would weigh the respective [545 U.S. 960] values of infringing and noninfringing uses; determine the efficiency and advisability of technological changes; or assess a product's potential future markets. The price of a wrong guess—even if it involves a good-faith effort to assess technical and commercial viability—could be large statutory damages (not less than $750 and up to $30,000 per infringed work). 17 U. S. C. § 504(c)(1). The additional risk and uncertainty would mean a consequent additional chill of technological development.

The third question—whether a positive copyright impact would outweigh any technology-related loss—I find the most difficult of the three. I do not doubt that a more intrusive Sony test would generally provide greater revenue security for copyright holders. But it is harder to conclude that the gains on the copyright swings would exceed the losses on the technology roundabouts.

For one thing, the law disfavors equating the two different kinds of gain and loss; rather, it leans in favor of protecting technology. As Sony itself makes clear, the producer of a technology which permits unlawful copying does not himself engage in unlawful copying—a fact that makes the attachment of copyright liability to the creation, production, or distribution of the technology an exceptional thing. See 464 U. S., at 431 (courts "must be circumspect" in construing the copyright laws to preclude distribution of new technologies). Moreover, Sony has been the law for some time. And that fact imposes a serious burden upon copyright holders like MGM to show a need for change in the current rules of the game, including a more strict interpretation of the test. See, e. g., Brief for Motion Picture Studio and Recording Company Petitioners 31 (Sony should not protect products when the "primary or principal" use is infringing).

In any event, the evidence now available does not, in my view, make out a sufficiently strong case for change. To say [545 U.S. 961] this is not to doubt the basic need to protect copyrighted material from infringement. The Constitution itself stresses the vital role that copyright plays in advancing the "useful Arts." Art. I, § 8, cl. 8. No one disputes that "reward to the author or artist serves to induce release to the public of the products of his creative genius." United States v. Paramount Pictures, Inc., 334 U. S. 131, 158 (1948). And deliberate unlawful copying is no less an unlawful taking of property than garden-variety theft. See, e. g., 18 U. S. C. § 2319 (2000 ed. and Supp. II) (criminal copyright infringement); § 1961(1)(B) (2000 ed., Supp. II) (copyright infringement can be a predicate act under the Racketeer Influenced and Corrupt Organizations Act); § 1956(c)(7)(D) (2000 ed., Supp. II) (money laundering includes the receipt of proceeds from copyright infringement). But these highly general principles cannot by themselves tell us how to balance the interests at issue in Sony or whether Sony's standard needs modification. And at certain key points, information is lacking.

Will an unmodified Sony lead to a significant diminution in the amount or quality of creative work produced? Since copyright's basic objective is creation and its revenue objectives but a means to that end, this is the underlying copyright question. See Twentieth Century Music Corp. v. Aiken, 422 U. S. 151, 156 (1975) ("Creative work is to be encouraged and rewarded, but private motivation must ultimately serve the cause of promoting broad public availability of literature, music, and the other arts"). And its answer is far from clear.

Unauthorized copying likely diminishes industry revenue, though it is not clear by how much. Compare S. Liebowitz, Will MP3 Downloads Annihilate the Record Industry? The Evidence So Far 2 (June 2003), http://www.utdallas.edu/~liebowit/intprop/records.pdf (all Internet materials as visited June 24, 2005, and available in Clerk of Court's case file)

[545 U.S. 962] (file sharing has caused a decline in music sales), and Press Release, Informa Telecoms & Media, Steady Download Growth Defies P2P (Dec. 6, 2004), http://www.informatm.com (citing Informa Media Group Report, Music on the Internet (5th ed. 2004)) (estimating total lost sales to the music industry in the range of $2 billion annually), with F. Oberholzer & K. Strumpf, The Effect of File Sharing on Record Sales: An Empirical Analysis 24 (Mar. 2004), www.unc.edu/~cigar/papers/FileSharing_March2004.pdf (academic study concluding that "file sharing has no statistically significant effect on purchases of the average album"), and D. McGuire, Study: File-Sharing No Threat to Music Sales (Mar. 29, 2004), http://www.washingtonpost.com/ac2/wp-dyn/A34300-2004Mar29?language=printer (discussing mixed evidence).

The extent to which related production has actually and resultingly declined remains uncertain, though there is good reason to believe that the decline, if any, is not substantial. See, e. g., M. Madden, Pew Internet & American Life Project, Artists, Musicians, and the Internet 21 (Dec. 5, 2004), http://www.pewinternet.org/pdfs/PIP_Artists. Musicians_Report.pdf (nearly 70% of musicians believe that file sharing is a minor threat or no threat at all to creative industries); Benkler, Sharing Nicely: On Shareable Goods and the Emergence of Sharing as a Modality of Economic Production, 114 Yale L. J. 273, 351-352 (2004) ("Much of the actual flow of revenue to artists—from performances and other sources—is stable even assuming a complete displacement of the CD market by peer-to-peer distribution . . . . [I]t would be silly to think that music, a cultural form without which no human society has existed, will cease to be in our world [because of illegal file swapping]").

More importantly, copyright holders at least potentially have other tools available to reduce piracy and to abate whatever threat it poses to creative production. As today's opinion makes clear, a copyright holder may proceed against [545 U.S. 963] a technology provider where a provable specific intent to infringe (of the kind the Court describes) is present. Ante, at 941. Services like Grokster may well be liable under an inducement theory.

In addition, a copyright holder has always had the legal authority to bring a traditional infringement suit against one who wrongfully copies. Indeed, since September 2003, the Recording Industry Association of America (RIAA) has filed "thousands of suits against people for sharing copyrighted material." Walker, New Movement Hits Universities: Get Legal Music, Washington Post, Mar. 17, 2005, p. E1. These suits have provided copyright holders with damages; have served as a teaching tool, making clear that much file sharing, if done without permission, is unlawful; and apparently have had a real and significant deterrent effect. See, e. g., L. Rainie, M. Madden, D. Hess, & G. Mudd, Pew Internet Project and comScore Media Metrix Data Memo: The state of music downloading and file-sharing online 2, 4, 6, 10 (Apr. 2004), http://www.pewinternet.org/pdfs/PIP_Filesharing_April_04.pdf (number of people downloading files fell from a peak of roughly 35 million to roughly 23 million in the year following the first suits; 38% of current downloaders report downloading fewer files because of the suits); M. Madden & L. Rainie, Pew Internet Project Data Memo: Music and video downloading moves beyond P2P, p. 7 (Mar. 2005), http://www. pewinternet.org/pdfs/PIP_Filesharing_March05.pdf (number of downloaders has "inched up" but "continues to rest well below the peak level"); Note, Costs and Benefits of the Recording Industry's Litigation Against Individuals, 20 Berkeley Tech. L. J. 571 (2005); but see Evangelista, File Sharing; Downloading Music and Movie Files is as Popular as Ever, San Francisco Chronicle, Mar. 28, 2005, p. E1 (referring to the continuing "tide of rampant copyright infringement," while noting that the RIAA says it believes the "campaign of lawsuits and public education has at least contained the problem").

[545 U.S. 964] Further, copyright holders may develop new technological devices that will help curb unlawful infringement. Some new technology, called "digital `watermarking'" and "digital fingerprint[ing]," can encode within the file information about the author and the copyright scope and date, which "fingerprints" can help to expose infringers. RIAA Reveals Method to Madness, Wired News (Aug. 28, 2003), http:// www.wired.com/news/digiwood/0,1412,60222,00.html; Besek, Anti-Circumvention Laws and Copyright: A Report from the Kernochan Center for Law, Media and the Arts, 27 Colum. J. L. & Arts 385, 391, 451 (2004). Other technology can, through encryption, potentially restrict users' ability to make a digital copy. See J. Borland, Tripping the Rippers, C/net News.com (Sept. 28, 2001), http://news.com.com/ Tripping+the+rippers/2009-1023_3-273619.html; but see Brief for Bridgemar Services, Ltd. d/b/a iMesh.com as Amicus Curiae 5-8 (arguing that peer-to-peer service providers can more easily block unlawful swapping).

At the same time, advances in technology have discouraged unlawful copying by making lawful copying (e. g., downloading music with the copyright holder's permission) cheaper and easier to achieve. Several services now sell music for less than $1 per song. (Walmart.com, for example, charges $0.88 each.) Consequently, many consumers initially attracted to the convenience and flexibility of services like Grokster are now migrating to lawful paid services (services with copying permission) where they can enjoy at little cost even greater convenience and flexibility without engaging in unlawful swapping. See Wu, When Code Isn't Law, 89 Va. L. Rev. 679, 731-735 (2003) (noting the prevalence of technological problems on unpaid swapping sites); K. Dean, P2P Tilts Toward Legitimacy, Wired News (Nov. 24, 2004), http://www.wired.com/news/ digiwood/0,1412,65836,00.html; Madden & Rainie, March 2005 Data Memo, supra, at 6-8 (percentage of current downloaders who have used paid services rose from 24% to 43% in a year; number using free services fell from 58% to 41%).

[545 U.S. 965] Thus, lawful music downloading services—those that charge the customer for downloading music and pay royalties to the copyright holder—have continued to grow and to produce substantial revenue. See Brief for Internet Law Faculty as Amicus Curiae 5-20; Bruno, Digital Entertainment: Piracy Fight Shows Encouraging Signs (Mar. 5, 2005), available at LEXIS, News Library, Billboard File (in 2004, consumers worldwide purchased more than 10 times the number of digital tracks purchased in 2003; global digital music market of $330 million in 2004 expected to double in 2005); Press Release, Informa Telecoms & Media, Steady Download Growth Defies P2P (global digital revenues will likely exceed $3 billion in 2010); Ashton, [International Federation of the Phonographic Industry] Predicts Downloads Will Hit the Mainstream, Music Week, Jan. 29, 2005, p. 6 (legal music sites and portable MP3 players "are helping to transform the digital music market" into "an everyday consumer experience"). And more advanced types of non-music-oriented peer-to-peer networks have also started to develop, drawing in part on the lessons of Grokster.

Finally, as Sony recognized, the legislative option remains available. Courts are less well suited than Congress to the task of "accommodat[ing] fully the varied permutations of competing interests that are inevitably implicated by such new technology." Sony, 464 U. S., at 431; see, e. g., Audio Home Recording Act of 1992, 106 Stat. 4237 (adding 17 U. S. C., ch. 10); Protecting Innovation and Art While Preventing Piracy: Hearing before the Senate Committee on the Judiciary, 108th Cong., 2d Sess. (2004).

I do not know whether these developments and similar alternatives will prove sufficient, but I am reasonably certain that, given their existence, a strong demonstrated need for modifying Sony (or for interpreting Sony's standard more strictly) has not yet been shown. That fact, along with the added risks that modification (or strict interpretation) would impose upon technological innovation, leads me to the conclusion that we should maintain Sony, reading its standard as I [545 U.S. 966] have read it. As so read, it requires affirmance of the Ninth Circuit's determination of the relevant aspects of the Sony question.

* * *

For these reasons, I disagree with JUSTICE GINSBURG, but I agree with the Court and join its opinion.

Notes:

[*] Briefs of amici curiae urging reversal were filed for the State of Utah et al. by Mark Shurtleff, Attorney General of Utah, and by the Attorneys General for their respective jurisdictions as follows: Troy King of Alabama, Gregg Renkes of Alaska, Terry Goddard of Arizona, Mike Beebe of Arkansas, M. Jane Brady of Delaware, Charles J. Crist, Jr., of Florida, Thurbert E. Baker of Georgia, Douglas B. Moylan of Guam, Mark J. Bennett of Hawaii, Lawrence G. Wasden of Idaho, Lisa Madigan of Illinois, Steve Carter of Indiana, Phill Kline of Kansas, Gregory D. Stumbo of Kentucky, Charles C. Foti, Jr., of Louisiana, Thomas F. Reilly of Massachusetts, Michael A. Cox of Michigan, Mike Hatch of Minnesota, Jim Hood of Mississippi, Jeremiah W. (Jay) Nixon of Missouri, Mike McGrath of Montana, Jon Bruning of Nebraska, Brian Sandoval of Nevada, Peter C. Harvey of New Jersey, Patricia A. Madrid of New Mexico, Roy Cooper of North Carolina, Wayne Stenehjem of North Dakota, Jim Petro of Ohio, W. A. Drew Edmondson of Oklahoma, Thomas W. Corbett, Jr., of Pennsylvania, Patrick Lynch of Rhode Island, Henry McMaster of South Carolina, Lawrence E. Long of South Dakota, Paul G. Summers of Tennessee, Greg Abbott of Texas, William H. Sorrell of Vermont, Jerry Kilgore of Virginia, Darrell V. McGraw, Jr., of West Virginia, and Peg Lautenschlager of Wisconsin; for the American Federation of Musicians of the United States and Canada et al. by George H. Cohen, Patricia Polach, and Laurence Gold; for the American Society of Composers, Authors and Publishers et al. by I. Fred Koenigsberg, Michael E. Salzman, and Marvin L. Berenson; for Americans for Tax Reform by Carter G. Phillips, Alan Charles Raul, Jay T. Jorgensen, and Eric A. Shumsky; for the Commissioner of Baseball et al. by Robert Alan Garrett and Hadrian R. Katz; for Defenders of Property Rights by Theodore B. Olson, Thomas H. Dupree, Jr., Matthew D. McGill, Nancie G. Marzulla, and Roger Marzulla; for International Rights Owners by Christopher Wolf; for Kids First Coalition et al. by Viet D. Dinh; for Law Professors et al. by James Gibson; for Macrovision Corp. by Geoffrey L. Beauchamp, Kelly G. Huller, and James H. Salter; for Napster, LLC, et al. by Barry I. Slotnick; for the National Academy of Recording Arts & Sciences, Inc., et al. by Jon A. Baumgarten and Jay L. Cooper; for the National Association of Broadcasters by Marsha J. MacBride, Jane E. Mago, Benjamin F. P. Ivins, and Jerianne Timmerman; for the National Association of Recording Merchandisers by Alan R. Malasky and Melanie Martin-Jones; for the Progress & Freedom Foundation by James V. DeLong; for the Video Software Dealers Association by John T. Mitchell; and for Professor Peter S. Menell et al. by Mr. Menell, pro se.

Briefs of amici curiae urging affirmance were filed for Altnet, Inc., by Roderick G. Dorman; for the American Civil Liberties Union et al. by Christopher A. Hansen, Steven R. Shapiro, Sharon M. McGowan, Ann Brick, and Jordan C. Budd; for the American Conservative Union et al. by David Post; for the Cellular Telecommunications & Internet Association et al. by Andrew G. McBride, Joshua S. Turner, Michael Altschul, James W. Olson, Frank L. Politano, Laura Kaster, Jeffrey A. Rackow, Grier C. Raclin, Michael Standard, John Thorne, Sarah B. Deutsch, and Paul J. Larkin, Jr.; for the Consumer Electronics Association et al. by Bruce G. Joseph and Scott E. Bain; for the Consumer Federation of America et al. by Peter Jaszi; for the Distributed Computing Industry Association by Mr. Dorman; for the Eagle Forum Education & Legal Defense Fund by Andrew L. Schlafly and Karen B. Tripp; for the Free Software Foundation et al. by Eben Moglen; for Intel Corp. by James M. Burger and Jonathan D. Hart; for Internet Law Faculty by William W. Fisher III and Jonathan Zittrain; for Law Professors by J. Glynn Lunney, Jr.; for the National Association of Shareholder and Consumer Attorneys by Kevin P. Roddy and Matthew E. Van Tine; for Sixty Intellectual Property and Technology Law Professors et al. by Deirdre K. Mulligan and Pamela Samuelson; for Sovereign Artists et al. by James R. Wheaton; for Computer Science Professor Harold Abelson et al. by James S. Tyre; for Professor Edward Lee et al. by Mr. Lee, pro se; for Charles Nesson by Mr. Nesson, pro se; and for Malla Pollack et al. by Ms. Pollack, pro se.

Briefs of amici curiae were filed for the American Intellectual Property Law Association by Rick D. Nydegger and Melvin C. Garner; for Audible Magic Corp. et al. by Bruce V. Spiva and Jeremy H. Stern; for Bridgemar Services, Ltd. d/b/a iMesh.com by Jeffrey A. Kimmel; for the Business Software Alliance by E. Edward Bruce and Robert A. Long, Jr.; for Creative Commons by Lawrence Lessig; for the Digital Media Association et al. by Lawrence Robbins, Alan Untereiner, Markham C. Erickson, and Jerry Berman; for Emerging Technology Companies by Michael Traynor and Matthew D. Brown; for IEEE-USA by Matthew J. Conigliaro, Andrew C. Greenberg, Joseph H. Lang, Jr., and Daniel E. Fisher; for Innovation Scholars and Economists by Laurence F. Pulgram; for the Intellectual Property Owners Association by James H. Pooley; for Media Studies Professors by Roy I. Liebman; for the National Venture Capital Association by Michael K. Kellogg, Mark L. Evans, and David L. Schwarz; for Sharman Networks Limited by Mr. Dorman; for SNOCAP, Inc., by Joel W. Nomkin; for Kenneth J. Arrow et al. by David A. Strauss; for Lee A. Hollaar by Lloyd W. Sadler; for U. S. Senator Patrick Leahy et al. by Mr. Leahy, pro se, and Senator Orrin G. Hatch, pro se; and for Felix Oberholzer-Gee et al. by Carl H. Settlemyer III and Arnold P. Lutzker.

[1] Peer-to-peer networks have disadvantages as well. Searches on peer-to-peer networks may not reach and uncover all available files because search requests may not be transmitted to every computer on the network. There may be redundant copies of popular files. The creator of the software has no incentive to minimize storage or bandwidth consumption, the costs of which are borne by every user of the network. Most relevant here, it is more difficult to control the content of files available for retrieval and the behavior of users.

[2] The studios and recording companies and the songwriters and music publishers filed separate suits against the defendants that were consolidated by the District Court.

[3] Subsequent versions of Morpheus, released after the record was made in this case, apparently rely not on Gnutella but on a technology called Neonet. These developments are not before us.

[4] There is some evidence that both Grokster and StreamCast previously operated supernodes, which compiled indexes of files available on all of the nodes connected to them. This evidence, pertaining to previous versions of the defendants' software, is not before us and would not affect our conclusions in any event.

[5] By comparison, evidence introduced by the plaintiffs in A&M Records, Inc. v. Napster, Inc., 239 F. 3d 1004 (CA9 2001), showed that 87% of files available on the Napster file-sharing network were copyrighted, id., at 1013.

[6] The Grokster founder contends that in answering these e-mails he often did not read them fully. App. 77, 769.

[7] The record makes clear that StreamCast developed these promotional materials but not whether it released them to the public. Even if these advertisements were not released to the public and do not show encouragement to infringe, they illuminate StreamCast's purposes.

[8] The mutual exclusivity of these values should not be overstated, however. On the one hand technological innovators, including those writing file-sharing computer programs, may wish for effective copyright protections for their work. See, e. g., Wu, When Code Isn't Law, 89 Va. L. Rev. 679, 750 (2003). (StreamCast itself was urged by an associate to "get [its] technology written down and [its intellectual property] protected." App. 866.) On the other hand the widespread distribution of creative works through improved technologies may enable the synthesis of new works or generate audiences for emerging artists. See Eldred v. Ashcroft, 537 U. S. 186, 223-226 (2003) (Stevens, J., dissenting); Van Houweling, Distributive Values in Copyright, 83 Texas L. Rev. 1535, 1539-1540, 1562-1564 (2005); Brief for Sovereign Artists et al. as Amici Curiae 11.

[9] We stated in Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417 (1984), that "`the lines between direct infringement, contributory infringement and vicarious liability are not clearly drawn' . . . . [R]easoned analysis of [the Sony plaintiffs' contributory infringement claim] necessarily entails consideration of arguments and case law which may also be forwarded under the other labels, and indeed the parties . . . rely upon such arguments and authority in support of their respective positions on the issue of contributory infringement," id., at 435, n. 17 (quoting Universal City Studios, Inc. v. Sony Corp. of America, 480 F. Supp. 429, 457-458 (CD Cal. 1979)). In the present case MGM has argued a vicarious liability theory, which allows imposition of liability when the defendant profits directly from the infringement and has a right and ability to supervise the direct infringer, even if the defendant initially lacks knowledge of the infringement. See, e. g., Shapiro, Bernstein & Co. v. H. L. Green Co., 316 F. 2d 304, 308 (CA2 1963); Dreamland Ball Room, Inc. v. Shapiro, Bernstein & Co., 36 F. 2d 354, 355 (CA7 1929). Because we resolve the case based on an inducement theory, there is no need to analyze separately MGM's vicarious liability theory.

[10] Nor does the Patent Act's exemption from liability for those who distribute a staple article of commerce, 35 U. S. C. § 271(c), extend to those who induce patent infringement, § 271(b).

[11] Inducement has been codified in patent law. Ibid.

[12] Of course, in the absence of other evidence of intent, a court would be unable to find contributory infringement liability merely based on a failure to take affirmative steps to prevent infringement, if the device otherwise was capable of substantial noninfringing uses. Such a holding would tread too close to the Sony safe harbor.

[13] Grokster and StreamCast contend that any theory of liability based on their conduct is not properly before this Court because the rulings in the trial and appellate courts dealt only with the present versions of their software, not "past acts . . . that allegedly encouraged infringement or assisted . . . known acts of infringement." Brief for Respondents 14; see also id., at 34. This contention misapprehends the basis for their potential liability. It is not only that encouraging a particular consumer to infringe a copyright can give rise to secondary liability for the infringement that results. Inducement liability goes beyond that, and the distribution of a product can itself give rise to liability where evidence shows that the distributor intended and encouraged the product to be used to infringe. In such a case, the culpable act is not merely the encouragement of infringement but also the distribution of the tool intended for infringing use. See Kalem Co. v. Harper Brothers, 222 U. S. 55, 62-63 (1911); Cable/Home Communication Corp. v. Network Productions, Inc., 902 F. 2d 829, 846 (CA11 1990); A&M Records, Inc. v. Abdallah, 948 F. Supp. 1449, 1456 (CD Cal. 1996).

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[14] JUSTICE BREYER finds in Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417 (1984), a "clear" rule permitting contributory liability for copyright infringement based on distribution of a product only when the product "will be used almost exclusively to infringe copyrights." Post, at 957. But cf. Sony, 464 U. S., at 442 (recognizing "copyright holder's legitimate demand for effective—not merely symbolic—protection"). Sony, as I read it, contains no clear, near-exclusivity test. Nor have Courts of Appeals unanimously recognized JUSTICE BREYER'S clear rule. Compare A&M Records, Inc. v. Napster, Inc., 239 F. 3d 1004, 1021 (CA9 2001) ("[E]vidence of actual knowledge of specific acts of infringement is required to hold a computer system operator liable for contributory copyright infringement."), with In re Aimster Copyright Litigation, 334 F. 3d 643, 649-650 (CA7 2003) ("[W]hen a supplier is offering a product or service that has noninfringing as well as infringing uses, some estimate of the respective magnitudes of these uses is necessary for a finding of contributory infringement. . . . But the balancing of costs and benefits is necessary only in a case in which substantial noninfringing uses, present or prospective, are demonstrated."). See also Matthew Bender & Co. v. West Pub. Co., 158 F. 3d 693, 707 (CA2 1998) ("The Supreme Court applied [the Sony] test to prevent copyright holders from leveraging the copyrights in their original work to control distribution of . . . products that might be used incidentally for infringement, but that had substantial noninfringing uses. . . . The same rationale applies here [to products] that have substantial, predominant and noninfringing uses as tools for research and citation."). All Members of the Court agree, moreover, that "the Court of Appeals misapplied Sony," at least to the extent it read that decision to limit "secondary liability" to a hardly ever category, "quite beyond the circumstances to which the case applied." Ante, at 933.

[15] Grokster and StreamCast, in the Court of Appeals' view, would be entitled to summary judgment unless MGM could show that the software companies had knowledge of specific acts of infringement and failed to act on that knowledge—a standard the court held MGM could not meet. 380 F. 3d, at 1162-1163.

[16] JUSTICE BREYER finds support for summary judgment in this motley collection of declarations and in a survey conducted by an expert retained by MGM. Post, at 952-955. That survey identified 75% of the files available through Grokster as copyrighted works owned or controlled by the plaintiffs, and 15% of the files as works likely copyrighted. App. 439. As to the remaining 10% of the files, "there was not enough information to form reasonable conclusions either as to what those files even consisted of, and/or whether they were infringing or non-infringing." Id., at 479. Even assuming, as JUSTICE BREYER does, that the Sony Court would have absolved Sony of contributory liability solely on the basis of the use of the Betamax for authorized time-shifting, post, at 950-951, summary judgment is not inevitably appropriate here. Sony stressed that the plaintiffs there owned "well below 10%" of copyrighted television programming, 464 U. S., at 443, and found, based on trial testimony from representatives of the four major sports leagues and other individuals authorized to consent to home recording of their copyrighted broadcasts, that a similar percentage of program copying was authorized, id., at 424. Here, the plaintiffs allegedly control copyrights for 70% or 75% of the material exchanged through the Grokster and StreamCast software, 380 F. 3d 1154, 1158 (CA9 2004); App. 439, and the District Court does not appear to have relied on comparable testimony about authorized copying from copyright holders.

[17] The District Court's conclusion that "[p]laintiffs do not dispute that [d]efendants' software is being used, and could be used, for substantial noninfringing purposes," 259 F. Supp. 2d 1029, 1036 (CD Cal. 2003); accord 380 F. 3d, at 1161, is, to say the least, dubious. In the courts below and in this Court, MGM has continuously disputed any such conclusion. Brief for Motion Picture Studio and Recording Company Petitioners 30-38; Brief for MGM Plaintiffs-Appellants in No. 03-55894 etc. (CA9), p. 41; App. 356-357, 361-365.