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The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors.

(Pub. L. 94–553, title I, § 101, Oct. 19, 1976, 90 Stat. 2546; Pub. L. 101–650, title VI, § 607, Dec. 1, 1990, 104 Stat. 5132; Pub. L. 102–492, Oct. 24, 1992, 106 Stat. 3145.)

Held: 2 Live Crew's commercial parody may be a fair use within the meaning of § 107. Pp. 574-594.

(a) Section 107, which provides that "the fair use of a copyrighted work . . . for purposes such as criticism [or] comment . . . is not an infringement . . .," continues the common-law tradition of fair use adjudication and requires case-by-case analysis rather than bright-line rules. The statutory examples of permissible uses provide only general guidance. The four statutory factors are to be explored and weighed together in light of copyright's purpose of promoting science and the arts. Pp. 574-578.

(b) Parody, like other comment and criticism, may claim fair use. Under the first of the four § 107 factors, "the purpose and character of the use, including whether such use is of a commercial nature . . .," the enquiry focuses on whether the new work merely supersedes the objects of the original creation, or whether and to what extent it is "transformative," altering the original with new expression, meaning, or message. 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. The heart of any parodist's claim to quote from existing material is the use of some elements of a prior author's composition to [510 U.S. 570] create a new one that, at least in part, comments on that author's work. But that tells courts little about where to draw the line. Thus, like other uses, parody has to work its way through the relevant factors. Pp. 578-581.

(c) The Court of Appeals properly assumed that 2 Live Crew's song contains parody commenting on and criticizing the original work, but erred in giving virtually dispositive weight to the commercial nature of that parody by way of a presumption, ostensibly culled from Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417, 451, that "every commercial use of copyrighted material is presumptively . . . unfair. . . ." The statute makes clear that a work's commercial nature is only one element of the first factor enquiry into its purpose and character, and Sony itself called for no hard evidentiary presumption. The Court of Appeals's rule runs counter to Sony and to the long common-law tradition of fair use adjudication. Pp. 581-585.

(d) The second § 107 factor, "the nature of the copyrighted work," is not much help in resolving this and other parody cases, since parodies almost invariably copy publicly known, expressive works, like the Orbison song here. P. 586.

(e) The Court of Appeals erred in holding that, as a matter of law, 2 Live Crew copied excessively from the Orbison original under the third § 107 factor, which 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 copying's purpose. Even if 2 Live Crew's copying of the original's first line of lyrics and characteristic opening bass riff may be said to go to the original's "heart," that heart is what most readily conjures up the song for parody, and it is the heart at which parody takes aim. Moreover, 2 Live Crew thereafter departed markedly from the Orbison lyrics and produced otherwise distinctive music. As to the lyrics, the copying was not excessive in relation to the song's parodic purpose. As to the music, this Court expresses no opinion whether repetition of the bass riff is excessive copying, but remands to permit evaluation of the amount taken, in light of the song's parodic purpose and character, its transformative elements, and considerations of the potential for market substitution. Pp. 586-589.

(f) The Court of Appeals erred in resolving the fourth § 107 factor, "the effect of the use upon the potential market for or value of the copyrighted work," by presuming, in reliance on Sony, supra, at 451, the likelihood of significant market harm based on 2 Live Crew's use for commercial gain. No "presumption" or inference of market harm that might find support in Sony is applicable to a case involving something beyond mere duplication for commercial purposes. The cognizable harm is market substitution, not any harm from criticism. As to parody [510 U.S. 571] pure and simple, it is unlikely that the work will act as a substitute for the original, since the two works usually serve different market functions. The fourth factor requires courts also to consider the potential market for derivative works. See, e. g., Harper & Row, Publishers, Inc. v. Nation Enterprises, 471 U. S. 539, 568. If the later work has cognizable substitution effects in protectible markets for derivative works, the law will look beyond the criticism to the work's other elements. 2 Live Crew's song comprises not only parody but also rap music. The absence of evidence or affidavits addressing the effect of 2 Live Crew's song on the derivative market for a nonparody, rap version of "Oh, Pretty Woman" disentitled 2 Live Crew, as the proponent of the affirmative defense of fair use, to summary judgment. Pp. 590-594.

972 F. 2d 1429, reversed and remanded.

SOUTER, J., delivered the opinion for a unanimous Court. KENNEDY, J., filed a concurring opinion, post, p. 596.

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

Bruce S. Rogow argued the cause for petitioners. With him on the briefs was Alan Mark Turk.

Sidney S. Rosdeitcher argued the cause for respondent. With him on the brief were Peter L. Felcher and Stuart M. Cobert.^[*]

JUSTICE SOUTER delivered the opinion of the Court.

We are called upon to decide whether 2 Live Crew's commercial parody of Roy Orbison's song, "Oh, Pretty Woman," [510 U.S. 572] may be a fair use within the meaning of the Copyright Act of 1976, 17 U. S. C. § 107 (1988 ed. and Supp. IV). Although the District Court granted summary judgment for 2 Live Crew, the Court of Appeals reversed, holding the defense of fair use barred by the song's commercial character and excessive borrowing. Because we hold that a parody's commercial character is only one element to be weighed in a fair use enquiry, and that insufficient consideration was given to the nature of parody in weighing the degree of copying, we reverse and remand.

In 1964, Roy Orbison and William Dees wrote a rock ballad called "Oh, Pretty Woman" and assigned their rights in it to respondent Acuff-Rose Music, Inc. See Appendix A, infra, at 594. Acuff-Rose registered the song for copyright protection.

Petitioners Luther R. Campbell, Christopher Wongwon, Mark Ross, and David Hobbs are collectively known as 2 Live Crew, a popular rap music group.^[1] In 1989, Campbell wrote a song entitled "Pretty Woman," which he later described in an affidavit as intended, "through comical lyrics, to satirize the original work. . . ." App. to Pet. for Cert. 80a. On July 5, 1989, 2 Live Crew's manager informed Acuff-Rose that 2 Live Crew had written a parody of "Oh, Pretty Woman," that they would afford all credit for ownership and authorship of the original song to Acuff-Rose, Dees, and Orbison, and that they were willing to pay a fee for the use they wished to make of it. Enclosed with the letter were a copy of the lyrics and a recording of 2 Live Crew's song. See Appendix B, infra, at 595. Acuff-Rose's agent refused permission, stating that "I am aware of the success [510 U.S. 573] enjoyed by `The 2 Live Crews', but I must inform you that we cannot permit the use of a parody of `Oh, Pretty Woman.'" App. to Pet. for Cert. 85a. Nonetheless, in June or July 1989,^[2] 2 Live Crew released records, cassette tapes, and compact discs of "Pretty Woman" in a collection of songs entitled "As Clean As They Wanna Be." The albums and compact discs identify the authors of "Pretty Woman" as Orbison and Dees and its publisher as Acuff-Rose.

Almost a year later, after nearly a quarter of a million copies of the recording had been sold, Acuff-Rose sued 2 Live Crew and its record company, Luke Skyywalker Records, for copyright infringement. The District Court granted summary judgment for 2 Live Crew,^[3] reasoning that the commercial purpose of 2 Live Crew's song was no bar to fair use; that 2 Live Crew's version was a parody, which "quickly degenerates into a play on words, substituting predictable lyrics with shocking ones" to show "how bland and banal the Orbison song" is; that 2 Live Crew had taken no more than was necessary to "conjure up" the original in order to parody it; and that it was "extremely unlikely that 2 Live Crew's song could adversely affect the market for the original." 754 F. Supp. 1150, 1154-1155, 1157-1158 (MD Tenn. 1991). The District Court weighed these factors and held that 2 Live Crew's song made fair use of Orbison's original. Id., at 1158-1159.

The Court of Appeals for the Sixth Circuit reversed and remanded. 972 F. 2d 1429, 1439 (1992). Although it assumed for the purpose of its opinion that 2 Live Crew's song [510 U.S. 574] was a parody of the Orbison original, the Court of Appeals thought the District Court had put too little emphasis on the fact that "every commercial use . . . is presumptively . . . unfair," Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417, 451 (1984), and it held that "the admittedly commercial nature" of the parody "requires the conclusion" that the first of four factors relevant under the statute weighs against a finding of fair use. 972 F. 2d, at 1435, 1437. Next, the Court of Appeals determined that, by "taking the heart of the original and making it the heart of a new work," 2 Live Crew had, qualitatively, taken too much. Id., at 1438. Finally, after noting that the effect on the potential market for the original (and the market for derivative works) is "undoubtedly the single most important element of fair use," Harper & Row, Publishers, Inc. v. Nation Enterprises, 471 U. S. 539, 566 (1985), the Court of Appeals faulted the District Court for "refus[ing] to indulge the presumption" that "harm for purposes of the fair use analysis has been established by the presumption attaching to commercial uses." 972 F. 2d, at 1438-1439. In sum, the court concluded that its "blatantly commercial purpose . . . prevents this parody from being a fair use." Id., at 1439.

We granted certiorari, 507 U. S. 1003 (1993), to determine whether 2 Live Crew's commercial parody could be a fair use.

It is uncontested here that 2 Live Crew's song would be an infringement of Acuff-Rose's rights in "Oh, Pretty Woman," under the Copyright Act of 1976, 17 U. S. C. § 106 (1988 ed. and Supp. IV), but for a finding of fair use through parody.^[4][510 U.S. 575] From the infancy of copyright protection, some opportunity for fair use of copyrighted materials has been thought necessary to fulfill copyright's very purpose, "[t]o promote the Progress of Science and useful Arts. . . ." U. S. Const., Art. I, § 8, cl. 8.^[5] For as Justice Story explained, "[i]n truth, in literature, in science and in art, there are, and can be, few, if any, things, which in an abstract sense, are strictly new and original throughout. Every book in literature, science and art, borrows, and must necessarily borrow, and use much which was well known and used before." Emerson v. Davies, 8 F. Cas. 615, 619 (No. 4,436) (CCD Mass. 1845). Similarly, Lord Ellenborough expressed the inherent tension in the need simultaneously to protect copyrighted material and to allow others to build upon it when he wrote, "while I shall think myself bound to secure every man in the enjoyment of his copy-right, one must not put manacles upon science." [510 U.S. 576] Carey v. Kearsley, 4 Esp. 168, 170, 170 Eng. Rep. 679, 681 (K. B. 1803). In copyright cases brought under the Statute of Anne of 1710,^[6] English courts held that in some instances "fair abridgements" would not infringe an author's rights, see W. Patry, The Fair Use Privilege in Copyright Law 6-17 (1985) (hereinafter Patry); Leval, Toward a Fair Use Standard, 103 Harv. L. Rev. 1105 (1990) (hereinafter Leval), and although the First Congress enacted our initial copyright statute, Act of May 31, 1790, 1 Stat. 124, without any explicit reference to "fair use," as it later came to be known,^[7] the doctrine was recognized by the American courts nonetheless.

In Folsom v. Marsh, 9 F. Cas. 342 (No. 4,901) (CCD Mass. 1841), Justice Story distilled the essence of law and methodology from the earlier cases: "look to the nature and objects of the selections made, the quantity and value of the materials used, and the degree in which the use may prejudice the sale, or diminish the profits, or supersede the objects, of the original work." Id., at 348. Thus expressed, fair use remained exclusively judge-made doctrine until the passage of the 1976 Copyright Act, in which Justice Story's summary is discernible:^[8]

"§ 107. Limitations on exclusive rights: Fair use

"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 [510 U.S. 577] 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 non-profit 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 (1988 ed. and Supp. IV).

Congress meant § 107 "to restate the present judicial doctrine of fair use, not to change, narrow, or enlarge it in any way" and intended that courts continue the common-law tradition of fair use adjudication. H. R. Rep. No. 94-1476, p. 66 (1976) (hereinafter House Report); S. Rep. No. 94-473, p. 62 (1975) (hereinafter Senate Report). 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." Stewart v. Abend, 495 U. S. 207, 236 (1990) (internal quotation marks and citation omitted).

The task is not to be simplified with bright-line rules, for the statute, like the doctrine it recognizes, calls for case-by-case analysis. Harper & Row, 471 U. S., at 560; Sony, 464 U. S., at 448, and n. 31; House Report, pp. 65-66; Senate Report, p. 62. The text employs the terms "including" and "such as" in the preamble paragraph to indicate the "illustrative and not limitative" function of the examples given, § 101; see Harper & Row, supra, at 561, which thus provide only general guidance about the sorts of copying that courts and [510 U.S. 578] Congress most commonly had found to be fair uses.^[9] 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. See Leval 1110-1111; Patry & Perlmutter, Fair Use Misconstrued: Profit, Presumptions, and Parody, 11 Cardozo Arts & Ent. L. J. 667, 685-687 (1993) (hereinafter Patry & Perlmutter).^[10]

The first factor in a fair use enquiry is "the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes." § 107(1). This factor draws on Justice Story's formulation, "the nature and objects of the selections made." Folsom v. Marsh, supra, at 348. The enquiry here may be guided by the examples given in the preamble to § 107, looking to whether the use is for criticism, or comment, or news reporting, [510 U.S. 579] and the like, see § 107. The central purpose of this investigation is to see, in Justice Story's words, whether the new work merely "supersede[s] the objects" of the original creation, Folsom v. Marsh, supra, at 348; accord, Harper & Row, supra, at 562 ("supplanting" the original), or instead adds something new, with a further purpose or different character, altering the first with new expression, meaning, or message; it asks, in other words, whether and to what extent the new work is "transformative." Leval 1111. Although such transformative use is not absolutely necessary for a finding of fair use, Sony, supra, at 455, n. 40,^[11] the goal of copyright, to promote science and the arts, is generally furthered by the creation of transformative works. Such works thus lie at the heart of the fair use doctrine's guarantee of breathing space within the confines of copyright, see, e. g., Sony, supra, at 478-480 (Blackmun, J., dissenting), and 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.

This Court has only once before even considered whether parody may be fair use, and that time issued no opinion because of the Court's equal division. Benny v. Loew's Inc., 239 F. 2d 532 (CA9 1956), aff'd sub nom. Columbia Broadcasting System, Inc. v. Loew's Inc., 356 U. S. 43 (1958). Suffice it to say now that parody has an obvious claim to transformative value, as Acuff-Rose itself does not deny. Like less ostensibly humorous forms of criticism, it can provide social benefit, by shedding light on an earlier work, and, in the process, creating a new one. We thus line up with the courts that have held that parody, like other comment or criticism, may claim fair use under § 107. See, e. g., Fisher v. Dees, 794 F. 2d 432 (CA9 1986) ("When Sonny Sniffs Glue," a parody of "When Sunny Gets Blue," is fair use); Elsmere Music, Inc. v. National Broadcasting Co., 482 F. Supp. 741 [510 U.S. 580] (SDNY), aff'd, 623 F. 2d 252 (CA2 1980) ("I Love Sodom," a "Saturday Night Live" television parody of "I Love New York," is fair use); see also House Report, p. 65; Senate Report, p. 61 ("[U]se in a parody of some of the content of the work parodied" may be fair use).

The germ of parody lies in the definition of the Greek parodeia, quoted in Judge Nelson's Court of Appeals dissent, as "a song sung alongside another." 972 F. 2d, at 1440, quoting 7 Encyclopedia Britannica 768 (15th ed. 1975). Modern dictionaries accordingly describe a parody as a "literary or artistic work that imitates the characteristic style of an author or a work for comic effect or ridicule,"^[12] or as a "composition in prose or verse in which the characteristic turns of thought and phrase in an author or class of authors are imitated in such a way as to make them appear ridiculous."^[13] For the purposes of copyright law, the nub of the definitions, and the heart of any parodist's claim to quote from existing material, is the use of some elements of a prior author's composition to create a new one that, at least in part, comments on that author's works. See, e. g., Fisher v. Dees, supra, at 437; MCA, Inc. v. Wilson, 677 F. 2d 180, 185 (CA2 1981). If, on the contrary, the commentary has no critical bearing on the substance or style of the original composition, which the alleged infringer merely uses to get attention or to avoid the drudgery in working up something fresh, the claim to fairness in borrowing from another's work diminishes accordingly (if it does not vanish), and other factors, like the extent of its commerciality, loom larger.^[14] Parody needs to mimic [510 U.S. 581] an original to make its point, and so has some claim to use the creation of its victim's (or collective victims') imagination, whereas satire can stand on its own two feet and so requires justification for the very act of borrowing.^[15] See ibid.; Bisceglia, Parody and Copyright Protection: Turning the Balancing Act Into a Juggling Act, in ASCAP, Copyright Law Symposium, No. 34, p. 25 (1987).

The fact that parody can claim legitimacy for some appropriation does not, of course, tell either parodist or judge much about where to draw the line. Like a book review quoting the copyrighted material criticized, parody may or may not be fair use, and petitioners' suggestion that any parodic use is presumptively fair has no more justification in law or fact than the equally hopeful claim that any use for news reporting should be presumed fair, see Harper & Row, 471 U. S., at 561. The Act has no hint of an evidentiary preference for parodists over their victims, and no workable presumption for parody could take account of the fact that parody often shades into satire when society is lampooned through its creative artifacts, or that a work may contain both parodic and nonparodic elements. Accordingly, parody, like any other use, has to work its way through the relevant factors, and be judged case by case, in light of the ends of the copyright law.

Here, the District Court held, and the Court of Appeals assumed, that 2 Live Crew's "Pretty Woman" contains parody, [510 U.S. 582] commenting on and criticizing the original work, whatever it may have to say about society at large. As the District Court remarked, the words of 2 Live Crew's song copy the original's first line, but then "quickly degenerat[e] into a play on words, substituting predictable lyrics with shocking ones . . . [that] derisively demonstrat[e] how bland and banal the Orbison song seems to them." 754 F. Supp., at 1155 (footnote omitted). Judge Nelson, dissenting below, came to the same conclusion, that the 2 Live Crew song "was clearly intended to ridicule the white-bread original" and "reminds us that sexual congress with nameless streetwalkers is not necessarily the stuff of romance and is not necessarily without its consequences. The singers (there are several) have the same thing on their minds as did the lonely man with the nasal voice, but here there is no hint of wine and roses." 972 F. 2d, at 1442. Although the majority below had difficulty discerning any criticism of the original in 2 Live Crew's song, it assumed for purposes of its opinion that there was some. Id., at 1435-1436, and n. 8.

We have less difficulty in finding that critical element in 2 Live Crew's song than the Court of Appeals did, although having found it we will not take the further step of evaluating its quality. The threshold question when fair use is raised in defense of parody is whether a parodic character may reasonably be perceived.^[16] Whether, going beyond that, parody is in good taste or bad does not and should not matter to fair use. As Justice Holmes explained, "[i]t would be a dangerous undertaking for persons trained only to the law to constitute themselves final judges of the worth of [a work], outside of the narrowest and most obvious limits. At [510 U.S. 583] the one extreme some works of genius would be sure to miss appreciation. Their very novelty would make them repulsive until the public had learned the new language in which their author spoke." Bleistein v. Donaldson Lithographing Co., 188 U. S. 239, 251 (1903) (circus posters have copyright protection); cf. Yankee Publishing Inc. v. News America Publishing, Inc., 809 F. Supp. 267, 280 (SDNY 1992) (Leval, J.) ("First Amendment protections do not apply only to those who speak clearly, whose jokes are funny, and whose parodies succeed") (trademark case).

While we might not assign a high rank to the parodic element here, we think it fair to say that 2 Live Crew's song reasonably could be perceived as commenting on the original or criticizing it, to some degree. 2 Live Crew juxtaposes the romantic musings of a man whose fantasy comes true, with degrading taunts, a bawdy demand for sex, and a sigh of relief from paternal responsibility. The later words can be taken as a comment on the naivete of the original of an earlier day, as a rejection of its sentiment that ignores the ugliness of street life and the debasement that it signifies. It is this joinder of reference and ridicule that marks off the author's choice of parody from the other types of comment and criticism that traditionally have had a claim to fair use protection as transformative works.^[17]

The Court of Appeals, however, immediately cut short the enquiry into 2 Live Crew's fair use claim by confining its treatment of the first factor essentially to one relevant fact, the commercial nature of the use. The court then inflated the significance of this fact by applying a presumption ostensibly [510 U.S. 584] culled from Sony, that "every commercial use of copy-righted material is presumptively . . . unfair. . . ." Sony, 464 U. S., at 451. In giving virtually dispositive weight to the commercial nature of the parody, the Court of Appeals erred.

The language of the statute makes clear that the commercial or nonprofit educational purpose of a work is only one element of the first factor enquiry into its purpose and character. Section 107(1) uses the term "including" to begin the dependent clause referring to commercial use, and the main clause speaks of a broader investigation into "purpose and character." As we explained in Harper & Row, Congress resisted attempts to narrow the ambit of this traditional enquiry by adopting categories of presumptively fair use, and it urged courts to preserve the breadth of their traditionally ample view of the universe of relevant evidence. 471 U. S., at 561; House Report, p. 66. Accordingly, the mere fact that a use is educational and not for profit does not insulate it from a finding of infringement, any more than the commercial character of a use bars a finding of fairness. If, indeed, commerciality carried presumptive force against a finding of fairness, the presumption would swallow nearly all of the illustrative uses listed in the preamble paragraph of § 107, including news reporting, comment, criticism, teaching, scholarship, and research, since these activities "are generally conducted for profit in this country." Harper & Row, supra, at 592 (Brennan, J., dissenting). Congress could not have intended such a rule, which certainly is not inferable from the common-law cases, arising as they did from the world of letters in which Samuel Johnson could pronounce that "[n]o man but a blockhead ever wrote, except for money." 3 Boswell's Life of Johnson 19 (G. Hill ed. 1934).

Sony itself called for no hard evidentiary presumption. There, we emphasized the need for a "sensitive balancing of interests," 464 U. S., at 455, n. 40, noted that Congress had "eschewed a rigid, bright-line approach to fair use," id., at [510 U.S. 585] 449, n. 31, and stated that the commercial or nonprofit educational character of a work is "not conclusive," id., at 448-449, but rather a fact to be "weighed along with other[s] in fair use decisions," id., at 449, n. 32 (quoting House Report, p. 66). The Court of Appeals's elevation of one sentence from Sony to a per se rule thus runs as much counter to Sony itself as to the long common-law tradition of fair use adjudication. Rather, as we explained in Harper & Row, Sony stands for the proposition that the "fact that a publication was commercial as opposed to nonprofit is a separate factor that tends to weigh against a finding of fair use." 471 U. S., at 562. But that is all, and the fact that even the force of that tendency will vary with the context is a further reason against elevating commerciality to hard presumptive significance. The use, for example, of a copyrighted work to advertise a product, even in a parody, will be entitled to less indulgence under the first factor of the fair use enquiry than the sale of a parody for its own sake, let alone one performed a single time by students in school. See generally Patry & Perlmutter 679-680; Fisher v. Dees, 794 F. 2d, at 437; Maxtone-Graham v. Burtchaell, 803 F. 2d 1253, 1262 (CA2 1986); Sega Enterprises Ltd. v. Accolade, Inc., 977 F. 2d 1510, 1522 (CA9 1992).^[18]

The second statutory factor, "the nature of the copy-righted work," § 107(2), draws on Justice Story's expression, the "value of the materials used." Folsom v. Marsh, 9 F. Cas., at 348. This factor calls for recognition that some works are closer to the core of intended copyright protection than others, with the consequence that fair use is more difficult to establish when the former works are copied. See, e. g., Stewart v. Abend, 495 U. S., at 237-238 (contrasting fictional short story with factual works); Harper & Row, 471 U. S., at 563-564 (contrasting soon-to-be-published memoir with published speech); Sony, 464 U. S., at 455, n. 40 (contrasting motion pictures with news broadcasts); Feist, 499 U. S., at 348-351 (contrasting creative works with bare factual compilations); 3 M. Nimmer & D. Nimmer, Nimmer on Copyright § 13.05[A][2] (1993) (hereinafter Nimmer); Leval 1116. We agree with both the District Court and the Court of Appeals that the Orbison original's creative expression for public dissemination falls within the core of the copyright's protective purposes. 754 F. Supp., at 1155-1156; 972 F. 2d, at 1437. This fact, however, is not much help in this case, or ever likely to help much in separating the fair use sheep from the infringing goats in a parody case, since parodies almost invariably copy publicly known, expressive works.

The third factor asks whether "the amount and substantiality of the portion used in relation to the copyrighted work as a whole," § 107(3) (or, in Justice Story's words, "the quantity and value of the materials used," Folsom v. Marsh, supra, at 348) are reasonable in relation to the purpose of the copying. Here, attention turns to the persuasiveness of a parodist's justification for the particular copying done, and the enquiry will harken back to the first of the statutory factors, for, as in prior cases, we recognize that the extent of permissible copying varies with the purpose and character [510 U.S. 587] of the use. See Sony, supra, at 449-450 (reproduction of entire work "does not have its ordinary effect of militating against a finding of fair use" as to home videotaping of television programs); Harper & Row, supra, at 564 ("[E]ven substantial quotations might qualify as fair use in a review of a published work or a news account of a speech" but not in a scoop of a soon-to-be-published memoir). The facts bearing on this factor will also tend to address the fourth, by revealing the degree to which the parody may serve as a market substitute for the original or potentially licensed derivatives. See Leval 1123.

The District Court considered the song's parodic purpose in finding that 2 Live Crew had not helped themselves overmuch. 754 F. Supp., at 1156-1157. The Court of Appeals disagreed, stating that "[w]hile it may not be inappropriate to find that no more was taken than necessary, the copying was qualitatively substantial. . . . We conclude that taking the heart of the original and making it the heart of a new work was to purloin a substantial portion of the essence of the original." 972 F. 2d, at 1438.

The Court of Appeals is of course correct that this factor calls for thought not only about the quantity of the materials used, but about their quality and importance, too. In Harper & Row, for example, the Nation had taken only some 300 words out of President Ford's memoirs, but we signaled the significance of the quotations in finding them to amount to "the heart of the book," the part most likely to be newsworthy and important in licensing serialization. 471 U. S., at 564-566, 568 (internal quotation marks omitted). We also agree with the Court of Appeals that whether "a substantial portion of the infringing work was copied verbatim" from the copyrighted work is a relevant question, see id., at 565, for it may reveal a dearth of transformative character or purpose under the first factor, or a greater likelihood of market harm under the fourth; a work composed primarily of an original, particularly its heart, with little added or changed, [510 U.S. 588] is more likely to be a merely superseding use, fulfilling demand for the original.

Where we part company with the court below is in applying these guides to parody, and in particular to parody in the song before us. Parody presents a difficult case. Parody's humor, or in any event its comment, necessarily springs from recognizable allusion to its object through distorted imitation. Its art lies in the tension between a known original and its parodic twin. When parody takes aim at a particular original work, the parody must be able to "conjure up" at least enough of that original to make the object of its critical wit recognizable. See, e. g., Elsmere Music, 623 F. 2d, at 253, n. 1; Fisher v. Dees, 794 F. 2d, at 438-439. What makes for this recognition is quotation of the original's most distinctive or memorable features, which the parodist can be sure the audience will know. Once enough has been taken to assure identification, how much more is reasonable will depend, say, on the extent to which the song's overriding purpose and character is to parody the original or, in contrast, the likelihood that the parody may serve as a market substitute for the original. But using some characteristic features cannot be avoided.

We think the Court of Appeals was insufficiently appreciative of parody's need for the recognizable sight or sound when it ruled 2 Live Crew's use unreasonable as a matter of law. It is true, of course, that 2 Live Crew copied the characteristic opening bass riff (or musical phrase) of the original, and true that the words of the first line copy the Orbison lyrics. But if quotation of the opening riff and the first line may be said to go to the "heart" of the original, the heart is also what most readily conjures up the song for parody, and it is the heart at which parody takes aim. Copying does not become excessive in relation to parodic purpose merely because the portion taken was the original's heart. If 2 Live Crew had copied a significantly less memorable part of the original, it is difficult to see how its parodic character [510 U.S. 589] would have come through. See Fisher v. Dees, supra, at 439.

This is not, of course, to say that anyone who calls himself a parodist can skim the cream and get away scot free. In parody, as in news reporting, see Harper & Row, supra, context is everything, and the question of fairness asks what else the parodist did besides go to the heart of the original. It is significant that 2 Live Crew not only copied the first line of the original, but thereafter departed markedly from the Orbison lyrics for its own ends. 2 Live Crew not only copied the bass riff and repeated it,^[19] but also produced otherwise distinctive sounds, interposing "scraper" noise, over-laying the music with solos in different keys, and altering the drum beat. See 754 F. Supp., at 1155. This is not a case, then, where "a substantial portion" of the parody itself is composed of a "verbatim" copying of the original. It is not, that is, a case where the parody is so insubstantial, as compared to the copying, that the third factor must be resolved as a matter of law against the parodists.

Suffice it to say here that, as to the lyrics, we think the Court of Appeals correctly suggested that "no more was taken than necessary," 972 F. 2d, at 1438, but just for that reason, we fail to see how the copying can be excessive in relation to its parodic purpose, even if the portion taken is the original's "heart." As to the music, we express no opinion whether repetition of the bass riff is excessive copying, and we remand to permit evaluation of the amount taken, in light of the song's parodic purpose and character, its transformative elements, and considerations of the potential for market substitution sketched more fully below.

The fourth fair use factor is "the effect of the use upon the potential market for or value of the copyrighted work." § 107(4). It requires courts to consider not only the extent of market harm caused by the particular actions of the alleged infringer, but also "whether unrestricted and widespread conduct of the sort engaged in by the defendant . . . would result in a substantially adverse impact on the potential market" for the original. Nimmer § 13.05[A][4], p. 13-102.61 (footnote omitted); accord, Harper & Row, 471 U. S., at 569; Senate Report, p. 65; Folsom v. Marsh, 9 F. Cas., at 349. The enquiry "must take account not only of harm to the original but also of harm to the market for derivative works." Harper & Row, supra, at 568.

Since fair use is an affirmative defense,^[20] its proponent would have difficulty carrying the burden of demonstrating fair use without favorable evidence about relevant markets.^[21] In moving for summary judgment, 2 Live Crew left themselves at just such a disadvantage when they failed to address the effect on the market for rap derivatives, and confined themselves to uncontroverted submissions that there was no likely effect on the market for the original. They did not, however, thereby subject themselves to the evidentiary presumption applied by the Court of Appeals. In assessing the likelihood of significant market harm, the Court of Appeals [510 U.S. 591] quoted from language in Sony that "`[i]f the intended use is for commercial gain, that likelihood may be presumed. But if it is for a noncommercial purpose, the likelihood must be demonstrated.'" 972 F. 2d, at 1438, quoting Sony, 464 U. S., at 451. The court reasoned that because "the use of the copyrighted work is wholly commercial, . . . we presume that a likelihood of future harm to Acuff-Rose exists." 972 F. 2d, at 1438. In so doing, the court resolved the fourth factor against 2 Live Crew, just as it had the first, by applying a presumption about the effect of commercial use, a presumption which as applied here we hold to be error.

No "presumption" or inference of market harm that might find support in Sony is applicable to a case involving something beyond mere duplication for commercial purposes. Sony's discussion of a presumption contrasts a context of verbatim copying of the original in its entirety for commercial purposes, with the noncommercial context of Sony itself (home copying of television programming). In the former circumstances, what Sony said simply makes common sense: when a commercial use amounts to mere duplication of the entirety of an original, it clearly "supersede[s] the objects," Folsom v. Marsh, supra, at 348, of the original and serves as a market replacement for it, making it likely that cognizable market harm to the original will occur. Sony, supra, at 451. But when, on the contrary, the second use is transformative, market substitution is at least less certain, and market harm may not be so readily inferred. Indeed, as to parody pure and simple, it is more likely that the new work will not affect the market for the original in a way cognizable under this factor, that is, by acting as a substitute for it ("supersed[ing] [its] objects"). See Leval 1125; Patry & Perlmutter 692, 697-698. This is so because the parody and the original usually serve different market functions. Bisceglia, ASCAP, Copyright Law Symposium, No. 34, at 23.

We do not, of course, suggest that a parody may not harm the market at all, but when a lethal parody, like a scathing [510 U.S. 592] theater review, kills demand for the original, it does not produce a harm cognizable under the Copyright Act. Because "parody may quite legitimately aim at garroting the original, destroying it commercially as well as artistically," B. Kaplan, An Unhurried View of Copyright 69 (1967), the role of the courts is to distinguish between "[b]iting criticism [that merely] suppresses demand [and] copyright infringement[, which] usurps it." Fisher v. Dees, 794 F. 2d, at 438.

This distinction between potentially remediable displacement and unremediable disparagement is reflected in the rule that there is no protectible derivative market for criticism. The market for potential derivative uses includes only those that creators of original works would in general develop or license others to develop. Yet the unlikelihood that creators of imaginative works will license critical reviews or lampoons of their own productions removes such uses from the very notion of a potential licensing market. "People ask . . . for criticism, but they only want praise." S. Maugham, Of Human Bondage 241 (Penguin ed. 1992). Thus, to the extent that the opinion below may be read to have considered harm to the market for parodies of "Oh, Pretty Woman," see 972 F. 2d, at 1439, the court erred. Accord, Fisher v. Dees, supra, at 437; Leval 1125; Patry & Perlmutter 688-691.^[22]

In explaining why the law recognizes no derivative market for critical works, including parody, we have, of course, been speaking of the later work as if it had nothing but a critical aspect (i. e., "parody pure and simple," supra, at 591). But the later work may have a more complex character, with effects not only in the arena of criticism but also in protectible markets for derivative works, too. In that sort of case, the law looks beyond the criticism to the other elements of the work, as it does here. 2 Live Crew's song comprises not [510 U.S. 593] only parody but also rap music, and the derivative market for rap music is a proper focus of enquiry, see Harper & Row, supra, at 568; Nimmer § 13.05[B]. Evidence of substantial harm to it would weigh against a finding of fair use,^[23] because the licensing of derivatives is an important economic incentive to the creation of originals. See 17 U. S. C. § 106(2) (copyright owner has rights to derivative works). Of course, the only harm to derivatives that need concern us, as discussed above, is the harm of market substitution. The fact that a parody may impair the market for derivative uses by the very effectiveness of its critical commentary is no more relevant under copyright than the like threat to the original market.^[24]

Although 2 Live Crew submitted uncontroverted affidavits on the question of market harm to the original, neither they, nor Acuff-Rose, introduced evidence or affidavits addressing the likely effect of 2 Live Crew's parodic rap song on the market for a nonparody, rap version of "Oh, Pretty Woman." And while Acuff-Rose would have us find evidence of a rap market in the very facts that 2 Live Crew recorded a rap parody of "Oh, Pretty Woman" and another rap group sought a license to record a rap derivative, there was no evidence that a potential rap market was harmed in any way by 2 Live Crew's parody, rap version. The fact that 2 Live Crew's parody sold as part of a collection of rap songs says very little about the parody's effect on a market for a rap version of the original, either of the music alone or of the music with its lyrics. The District Court essentially passed [510 U.S. 594] on this issue, observing that Acuff-Rose is free to record "whatever version of the original it desires," 754 F. Supp., at 1158; the Court of Appeals went the other way by erroneous presumption. Contrary to each treatment, it is impossible to deal with the fourth factor except by recognizing that a silentrecord on an important factor bearing on fair use disentitled the proponent of the defense, 2 Live Crew, to summary judgment. The evidentiary hole will doubtless be plugged on remand.

It was error for the Court of Appeals to conclude that the commercial nature of 2 Live Crew's parody of "Oh, Pretty Woman" rendered it presumptively unfair. No such evidentiary presumption is available to address either the first factor, the character and purpose of the use, or the fourth, market harm, in determining whether a transformative use, such as parody, is a fair one. The court also erred in holding that 2 Live Crew had necessarily copied excessively from the Orbison original, considering the parodic purpose of the use. We therefore reverse the judgment of the Court of Appeals and remand the case for further proceedings consistent with this opinion.

It is so ordered.

"Oh, Pretty Woman" by Roy Orbison and William Dees

Pretty Woman, walking down the street,

Pretty Woman, the kind I like to meet,

Pretty Woman, I don't believe you, you're not the truth,

No one could look as good as you Mercy

Pretty Woman, won't you pardon me,

Pretty Woman, I couldn't help but see,

[510 U.S. 595] Pretty Woman, that you look lovely as can be Are you lonely just like me?

Pretty Woman, stop a while,

Pretty Woman, talk a while,

Pretty Woman give your smile to me

Pretty Woman, yeah, yeah, yeah

Pretty Woman, look my way,

Pretty Woman, say you'll stay with me

'Cause I need you, I'll treat you right

Come to me baby, Be mine tonight

Pretty Woman, don't walk on by,

Pretty Woman, don't make me cry,

Pretty Woman, don't walk away,

Hey, O. K.

If that's the way it must be, O. K.

I guess I'll go on home, it's late

There'll be tomorrow night, but wait!

What do I see

Is she walking back to me?

Yeah, she's walking back to me!

Oh, Pretty Woman.

"Pretty Woman" as Recorded by 2 Live Crew

Pretty woman walkin' down the street

Pretty woman girl you look so sweet

Pretty woman you bring me down to that knee

Pretty woman you make me wanna beg please

Oh, pretty woman

Big hairy woman you need to shave that stuff

Big hairy woman you know I bet it's tough

Big hairy woman all that hair it ain't legit

[510 U.S. 596] 'Cause you look like ‘Cousin It'

Big hairy woman

Bald headed woman girl your hair won't grow

Bald headed woman you got a teeny weeny afro

Bald headed woman you know your hair could look nice

Bald headed woman first you got to roll it with rice

Bald headed woman here, let me get this hunk of biz for ya

Ya know what I'm saying you look better than rice a roni

Oh bald headed woman

Big hairy woman come on in

And don't forget your bald headed friend

Hey pretty woman let the boys Jump in

Two timin' woman girl you know you ain't right

Two timin' woman you's out with my boy last night

Two timin' woman that takes a load off my mind

Two timin' woman now I know the baby ain't mine

Oh, two timin' woman

Oh pretty woman

I agree that remand is appropriate and join the opinion of the Court, with these further observations about the fair use analysis of parody.

The common-law method instated by the fair use provision of the copyright statute, 17 U. S. C. § 107 (1988 ed. and Supp. IV), presumes that rules will emerge from the course of decisions. I agree that certain general principles are now discernible to define the fair use exception for parody. One of these rules, as the Court observes, is that parody may qualify as fair use regardless of whether it is published or performed [510 U.S. 597] for profit. Ante, at 591. Another is that parody may qualify as fair use only if it draws upon the original composition to make humorous or ironic commentary about that same composition. Ante, at 580. It is not enough that the parody use the original in a humorous fashion, however creative that humor may be. The parody must target the original, and not just its general style, the genre of art to which it belongs, or society as a whole (although if it targets the original, it may target those features as well). See Rogers v. Koons, 960 F. 2d 301, 310 (CA2 1992) ("[T]hough the satire need not be only of the copied work and may . . . also be a parody of modern society, the copied work must be, at least in part, an object of the parody"); Fisher v. Dees, 794 F. 2d 432, 436 (CA9 1986) ("[A] humorous or satiric work deserves protection under the fair-use doctrine only if the copied work is at least partly the target of the work in question"). This prerequisite confines fair use protection to works whose very subject is the original composition and so necessitates some borrowing from it. See MCA, Inc. v. Wilson, 677 F. 2d 180, 185 (CA2 1981) ("[I]f the copyrighted song is not at least in part an object of the parody, there is no need to conjure it up"); Bisceglia, Parody and Copyright Protection: Turning the Balancing Act Into a Juggling Act, in ASCAP, Copyright Law Symposium, No. 34, pp. 23-29 (1987). It also protects works we have reason to fear will not be licensed by copyright holders who wish to shield their works from criticism. See Fisher, supra, at 437 ("Self-esteem is seldom strong enough to permit the granting of permission even in exchange for a reasonable fee"); Posner, When Is Parody Fair Use?, 21 J. Legal Studies 67, 73 (1992) ("There is an obstruction when the parodied work is a target of the parodist's criticism, for it may be in the private interest of the copyright owner, but not in the social interest, to suppress criticism of the work") (emphasis deleted).

If we keep the definition of parody within these limits, we have gone most of the way towards satisfying the four-factor [510 U.S. 598] fair use test in § 107. The first factor (the purpose and character of use) itself concerns the definition of parody. The second factor (the nature of the copyrighted work) adds little to the first, since "parodies almost invariably copy publicly known, expressive works." Ante, at 586. The third factor (the amount and substantiality of the portion used in relation to the whole) is likewise subsumed within the definition of parody. In determining whether an alleged parody has taken too much, the target of the parody is what gives content to the inquiry. Some parodies, by their nature, require substantial copying. See Elsmere Music, Inc. v. National Broadcasting Co., 623 F. 2d 252 (CA2 1980) (holding that "I Love Sodom" skit on "Saturday Night Live" is legitimate parody of the "I Love New York" campaign). Other parodies, like Lewis Carroll's "You Are Old, Father William," need only take parts of the original composition. The third factor does reinforce the principle that courts should not accord fair use protection to profiteers who do no more than add a few silly words to someone else's song or place the characters from a familiar work in novel or eccentric poses. See, e. g., Walt Disney Productions v. Air Pirates, 581 F. 2d 751 (CA9 1978); DC Comics Inc. v. Unlimited Monkey Business, Inc., 598 F. Supp. 110 (ND Ga. 1984). But, as I believe the Court acknowledges, ante, at 588-589, it is by no means a test of mechanical application. In my view, it serves in effect to ensure compliance with the targeting requirement.

As to the fourth factor (the effect of the use on the market for the original), the Court acknowledges that it is legitimate for parody to suppress demand for the original by its critical effect. Ante, at 591-592. What it may not do is usurp demand by its substitutive effect. Ibid. It will be difficult, of course, for courts to determine whether harm to the market results from a parody's critical or substitutive effects. But again, if we keep the definition of parody within appropriate bounds, this inquiry may be of little significance. If a work targets another for humorous or ironic effect, it is by definition [510 U.S. 599] a new creative work. Creative works can compete with other creative works for the same market, even if their appeal is overlapping. Factor four thus underscores the importance of ensuring that the parody is in fact an independent creative work, which is why the parody must "make some critical comment or statement about the original work which reflects the original perspective of the parodist—thereby giving the parody social value beyond its entertainment function." Metro-Goldwyn-Mayer, Inc. v. Showcase Atlanta Cooperative Productions, Inc., 479 F. Supp. 351, 357 (ND Ga. 1979).

The fair use factors thus reinforce the importance of keeping the definition of parody within proper limits. More than arguable parodic content should be required to deem a would-be parody a fair use. Fair use is an affirmative defense, so doubts about whether a given use is fair should not be resolved in favor of the self-proclaimed parodist. We should not make it easy for musicians to exploit existing works and then later claim that their rendition was a valuable commentary on the original. Almost any revamped modern version of a familiar composition can be construed as a "comment on the naivete of the original," ante, at 583, because of the difference in style and because it will be amusing to hear how the old tune sounds in the new genre. Just the thought of a rap version of Beethoven's Fifth Symphony or "Achy Breaky Heart" is bound to make people smile. If we allow any weak transformation to qualify as parody, however, we weaken the protection of copyright. And under-protection of copyright disserves the goals of copyright just as much as overprotection, by reducing the financial incentive to create.

The Court decides it is "fair to say that 2 Live Crew's song reasonably could be perceived as commenting on the original or criticizing it, to some degree." Ibid. (applying the first fair use factor). While I am not so assured that 2 Live Crew's song is a legitimate parody, the Court's treatment of [510 U.S. 600] the remaining factors leaves room for the District Court to determine on remand that the song is not a fair use. As future courts apply our fair use analysis, they must take care to ensure that not just any commercial takeoff is rationalized post hoc as a parody.

With these observations, I join the opinion of the Court.

[*] Briefs of amici curiae urging reversal were filed for the American Civil Liberties Union by Steven F. Reich, Steven R. Shapiro, Marjorie Heins, and John A. Powell; for Capitol Steps Production, Inc., et al. by William C. Lane; for the Harvard Lampoon, Inc., by Robert H. Loeffler and Jonathan Band; for the PEN American Center by Leon Friedman; and for Robert C. Berry et al. by Alfred C. Yen.

Briefs of amici curiae urging affirmance were filed for the National Music Publishers' Association, Inc., et al. by Marvin E. Frankel and Michael S. Oberman; and for Fred Ebb et al. by Stephen Rackow Kaye, Charles S. Sims, and Jon A. Baumgarten.

Briefs of amici curiae were filed for Home Box Office et al. by Daniel M. Waggoner, P. Cameron DeVore, George Vradenburg, Bonnie Bogin, and Richard Cotton; and for Warner Bros. by Cary H. Sherman and Robert Alan Garrett.

__________

[1] Rap has been defined as a "style of black American popular music consisting of improvised rhymes performed to a rhythmic accompaniment." The Norton/Grove Concise Encyclopedia of Music 613 (1988). 2 Live Crew plays "[b]ass music," a regional, hip-hop style of rap from the Liberty City area of Miami, Florida. Brief for Petitioners 34.

[2] The parties argue about the timing. 2 Live Crew contends that the album was released on July 15, and the District Court so held. 754 F. Supp. 1150, 1152 (MD Tenn. 1991). The Court of Appeals states that Campbell's affidavit puts the release date in June, and chooses that date. 972 F. 2d 1429, 1432 (CA6 1992). We find the timing of the request irrelevant for purposes of this enquiry. See n. 18, infra, discussing good faith.

[3] 2 Live Crew's motion to dismiss was converted to a motion for summary judgment. Acuff-Rose defended against the motion, but filed no cross-motion.

[4] Section 106 provides in part:

"Subject to sections 107 through 120, 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;

"(2) to prepare derivative works based upon the copyrighted work;

"(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 . . . ."

A derivative work is defined as one "based upon one or more preexisting works, such as a translation, musical arrangement, dramatization, fictionalization, motion picture version, sound recording, art reproduction, abridgment, condensation, or any other form in which a work may be recast, transformed, or adapted. A work consisting of editorial revisions, annotations, elaborations, or other modifications which, as a whole, represent an original work of authorship, is a `derivative work.' " 17 U. S. C. § 101.

2 Live Crew concedes that it is not entitled to a compulsory license under § 115 because its arrangement changes "the basic melody or fundamental character" of the original. § 115(a)(2).

[5] The exclusion of facts and ideas from copyright protection serves that goal as well. See § 102(b) ("In no case does copyright protection for an original work of authorship extend to any idea, procedure, process, system, method of operation, concept, principle, or discovery..."); Feist Publications, Inc. v. Rural Telephone Service Co., 499 U. S. 340, 359 (1991) ("[F]acts contained in existing works may be freely copied"); Harper & Row, Publishers, Inc. v. Nation Enterprises, 471 U. S. 539, 547 (1985) (copyright owner's rights exclude facts and ideas, and fair use).

[6] An Act for the Encouragement of Learning, 8 Anne, ch. 19.

[7] Patry 27, citing Lawrence v. Dana, 15 F. Cas. 26, 60 (No. 8,136) (CCD Mass. 1869).

[8] Leval 1105. For a historical account of the development of the fair use doctrine, see Patry 1-64.

[9] See Senate Report, p. 62 ("[W]hether a use referred to in the first sentence of section 107 is a fair use in a particular case will depend upon the application of the determinative factors").

[10] Because the fair use enquiry often requires close questions of judgment as to the extent of permissible borrowing in cases involving parodies (or other critical works), courts may also wish to bear in mind that the goals of the copyright law, "to stimulate the creation and publication of edifying matter," Leval 1134, are not always best served by automatically granting injunctive relief when parodists are found to have gone beyond the bounds of fair use. See 17 U. S. C. § 502(a) (court "may . . . grant . . . injunctions on such terms as it may deem reasonable to prevent or restrain infringement") (emphasis added); Leval 1132 (while in the "vast majority of cases, [an injunctive] remedy is justified because most infringements are simple piracy," such cases are "worlds apart from many of those raising reasonable contentions of fair use" where "there may be a strong public interest in the publication of the secondary work [and] the copyright owner's interest may be adequately protected by an award of damages for whatever infringement is found"); Abend v. MCA, Inc., 863 F. 2d 1465, 1479 (CA9 1988) (finding "special circumstances" that would cause "great injustice" to defendants and "public injury" were injunction to issue), aff'd sub nom. Stewart v. Abend, 495 U. S. 207 (1990).

[11] The obvious statutory exception to this focus on transformative uses is the straight reproduction of multiple copies for classroom distribution.

[12] American Heritage Dictionary 1317 (3d ed. 1992).

[13] 11 Oxford English Dictionary 247 (2d ed. 1989).

[14] A parody that more loosely targets an original than the parody presented here may still be sufficiently aimed at an original work to come within our analysis of parody. If a parody whose wide dissemination in the market runs the risk of serving as a substitute for the original or licensed derivatives (see infra, at 590-594, discussing factor four), it is more incumbent on one claiming fair use to establish the extent of transformation and the parody's critical relationship to the original. By contrast, when there is little or no risk of market substitution, whether because of the large extent of transformation of the earlier work, the new work's minimal distribution in the market, the small extent to which it borrows from an original, or other factors, taking parodic aim at an original is a less critical factor in the analysis, and looser forms of parody may be found to be fair use, as may satire with lesser justification for the borrowing than would otherwise be required.

[15] Satire has been defined as a work "in which prevalent follies or vices are assailed with ridicule," 14 Oxford English Dictionary, supra, at 500, or are "attacked through irony, derision, or wit," American Heritage Dictionary, supra, at 1604.

[16] The only further judgment, indeed, that a court may pass on a work goes to an assessment of whether the parodic element is slight or great, and the copying small or extensive in relation to the parodic element, for a work with slight parodic element and extensive copying will be more likely to merely "supersede the objects" of the original. See infra, at 586-594, discussing factors three and four.

[17] We note in passing that 2 Live Crew need not label their whole album, or even this song, a parody in order to claim fair use protection, nor should 2 Live Crew be penalized for this being its first parodic essay. Parody serves its goals whether labeled or not, and there is no reason to require parody to state the obvious (or even the reasonably perceived). See Patry & Perlmutter 716-717.

[18] Finally, regardless of the weight one might place on the alleged infringer's state of mind, compare Harper & Row, 471 U. S., at 562 (fair use presupposes good faith and fair dealing) (quotation marks omitted), with Folsom v. Marsh, 9 F. Cas. 342, 349 (No. 4,901) (CCD Mass. 1841) (good faith does not bar a finding of infringement); Leval 1126-1127 (good faith irrelevant to fair use analysis), we reject Acuff-Rose's argument that 2 Live Crew's request for permission to use the original should be weighed against a finding of fair use. Even if good faith were central to fair use, 2 Live Crew's actions do not necessarily suggest that they believed their version was not fair use; the offer may simply have been made in a good-faith effort to avoid this litigation. If the use is otherwise fair, then no permission need be sought or granted. Thus, being denied permission to use a work does not weigh against a finding of fair use. See Fisher v. Dees, 794 F. 2d 432, 437 (CA9 1986).

[19] This may serve to heighten the comic effect of the parody, as one witness stated, App. 32a, Affidavit of Oscar Brand; see also Elsmere Music, Inc. v. National Broadcasting Co., 482 F. Supp. 741, 747 (SDNY 1980) (repetition of "I Love Sodom"), or serve to dazzle with the original's music, as Acuff-Rose now contends.

[20] Harper & Row, 471 U. S., at 561; H. R. Rep. No. 102-836, p. 3, n. 3 (1992).

[21] Even favorable evidence, without more, is no guarantee of fairness. Judge Leval gives the example of the film producer's appropriation of a composer's previously unknown song that turns the song into a commercial success; the boon to the song does not make the film's simple copying fair. Leval 1124, n. 84. This factor, no less than the other three, may be addressed only through a "sensitive balancing of interests." Sony Corp. of America v. Universal City Studios, Inc., 464 U. S. 417, 455, n. 40 (1984). Market harm is a matter of degree, and the importance of this factor will vary, not only with the amount of harm, but also with the relative strength of the showing on the other factors.

[22] We express no opinion as to the derivative markets for works using elements of an original as vehicles for satire or amusement, making no comment on the original or criticism of it.

[23] See Nimmer § 13.05[A][4], p. 13-102.61 ("a substantially adverse impact on the potential market"); Leval 1125 ("reasonably substantial" harm); Patry & Perlmutter 697-698 (same).

[24] In some cases it may be difficult to determine whence the harm flows. In such cases, the other fair use factors may provide some indicia of the likely source of the harm. A work whose overriding purpose and character is parodic and whose borrowing is slight in relation to its parody will be far less likely to cause cognizable harm than a work with little parodic content and much copying.

203 F.3d 596 (9th Cir. 2000)

No. 99-15852.
U.S. Court of Appeals for the Ninth Circuit.
Argued and Submitted September 14, 1999.
Filed February 10, 2000.

[598] COUNSEL: William S. Coats, III, Howrey & Simon, Menlo Park, California, for the defendant-appellant.

Ezra Hendon, Crosby, Heafey, Roach & May, Oakland, California; James G. Gilliland, Jr., Townsend and Townsend and Crew, San Francisco, California, for the plaintiffs-appellees.

Annette L. Hurst, Howard, Rice, Nemerovski, Canady, Falk & Rabkin, San Francisco, California, for amicus Institute for Electrical and Electronics Engineers USA. Peter M. C. Choy, American Committee for Interoperable Systems, Palo Alto, California, for amici American Committee for Interoperable Systems and Computer & Communications Industry Association. Mark Lemley, University of Texas at Austin, Austin, Texas, for amicus Law Professors. Steven J. Metalitz, Smith & Metalitz, Washington, D.C., for amici Nintendo of America, Inc., Sega of America, Inc., and 3dfx Interactive.

Appeal from the United States District Court for the Northern District of California; Charles A. Legge, District Judge, Presiding D.C. No. CV-99-00390-CAL.

Before: Herbert Y. C. Choy, William C. Canby, Jr. and Barry G. Silverman, Circuit Judges.

CANBY, Circuit Judge:

In this case we are called upon once again to apply the principles of copyright law to computers and their software, to determine what must be protected as expression and what must be made accessible to the public as function. Sony Computer Entertainment, Inc., which brought this copyright infringement action, produces and markets the Sony PlayStation console, a small computer with hand controls that connects to a television console and plays games that are inserted into the PlayStation on compact discs (CDs). Sony owns the copyright on the basic input-output system or BIOS, which is the software program that operates its PlayStation. Sony has asserted no patent rights in this proceeding.

The defendant is the Connectix Corporation, which makes and sells a software program called "Virtual Game Station." The purpose of the Virtual Game Station is to emulate on a regular computer the functioning of the Sony PlayStation console, so that computer owners who buy the Virtual Game Station software can play Sony PlayStation games on their computers. The Virtual Game Station does not contain any of Sony's copyrighted material. In the process of producing the Virtual Game Station, however, Connectix repeatedly copied Sony's copyrighted BIOS during a process of "reverse engineering" that Connectix conducted in order to find out how the Sony PlayStation worked. Sony claimed infringement and sought a preliminary injunction. The district court concluded [599] that Sony was likely to succeed on its infringement claim because Connectix's "intermediate copying" was not a protected "fair use" under 17 U.S.C. S 107. The district court enjoined Connectix from selling the Virtual Game Station or from copying or using the Sony BIOS code in the development of other Virtual Game Station products.

Connectix now appeals. We reverse and remand with instructions to dissolve the injunction. The intermediate copies made and used by Connectix during the course of its reverse engineering of the Sony BIOS were protected fair use, necessary to permit Connectix to make its non-infringing Virtual Game Station function with PlayStation games. Any other intermediate copies made by Connectix do not support injunctive relief, even if those copies were infringing.

The district court also found that Sony is likely to prevail on its claim that Connectix's sale of the Virtual Game Station program tarnishes the Sony PlayStation mark under 15 U.S.C. S 1125. We reverse that ruling as well.

Sony is the developer, manufacturer and distributor of both the Sony PlayStation and Sony PlayStation games. Sony also licenses other companies to make games that can play on the PlayStation. The PlayStation system consists of a console (essentially a mini-computer), controllers, and software that produce a three-dimensional game for play on a television set. The PlayStation games are CDs that load into the top of the console. The PlayStation console contains both (1) hardware components and (2) software known as firmware that is written onto a read-only memory (ROM) chip. The firmware is the Sony BIOS. Sony has a copyright on the BIOS. It has claimed no patent relevant to this proceeding on any component of the PlayStation. PlayStation is a registered trademark of Sony.

Connectix's Virtual Game Station is software that "emulates" the functioning of the PlayStation console. That is, a consumer can load the Virtual Game Station software onto a computer, load a PlayStation game into the computer's CDROM drive, and play the PlayStation game. The Virtual Game Station software thus emulates both the hardware and firmware components of the Sony console. The Virtual Game Station does not play PlayStation games as well as Sony's PlayStation does. At the time of the injunction, Connectix had marketed its Virtual Game Station for Macintosh computer systems but had not yet completed Virtual Game Station software for Windows.

Copyrighted software ordinarily contains both copyrighted and unprotected or functional elements. Sega Enters. Ltd. v. Accolade, Inc., 977 F.2d 1510, 1520 (9th Cir. 1993) (amended opinion); see 17 U.S.C. S 102(b) (Copyright protection does not extend to any "idea, procedure, process, system, method of operation, concept, principle, or discovery" embodied in the copyrighted work.). Software engineers designing a product that must be compatible with a copyrighted product frequently must "reverse engineer" the copyrighted product to gain access to the functional elements of the copyrighted product. See Andrew Johnson-Laird, Software Reverse Engineering in the Real World, 19 U. Dayton L. Rev. 843, 845-46 (1994).

Reverse engineering encompasses several methods of gaining access to the functional elements of a software program. They include: (1) reading about the program; (2) observing "the program in operation by using it on a computer;" (3) performing a "static examination of the individual computer instructions contained within the program;" and (4) performing a "dynamic examination of the individual computer instructions as the program is being run on a computer." Id. at 846. [600] Method (1) is the least effective, because individual software manuals often misdescribe the real product. See id. It would be particularly ineffective in this case because Sony does not make such information available about its PlayStation. Methods (2), (3), and (4) require that the person seeking access load the target program on to a computer, an operation that necessarily involves copying the copyrighted program into the computer's random access memory or RAM.^[1]

Method (2), observation of a program, can take several forms. The functional elements of some software programs, for example word processing programs, spreadsheets, and video game displays may be discernible by observation of the computer screen. See Sega, 977 F.2d at 1520. Of course, the reverse engineer in such a situation is not observing the object code itself,^[2] only the external visual expression of this code's operation on the computer. Here, the software program is copied each time the engineer boots up the computer, and the computer copies the program into RAM.

Other forms of observation are more intrusive. Operations systems, system interface procedures, and other programs like the Sony BIOS are not visible to the user when they are operating. See id. One method of "observing" the operation of these programs is to run the program in an emulated environment. In the case of the Sony BIOS, this meant operating the BIOS on a computer with software that simulated the operation of the PlayStation hardware; operation of the program, in conjunction with another program known as a "debugger," permitted the engineers to observe the signals sent between the BIOS and other programs on the computer. This latter method required copying the Sony BIOS from a chip in the PlayStation onto the computer. The Sony BIOS was copied again each time the engineers booted up their computer and the computer copied the program into RAM. All of this copying was intermediate; that is, none of the Sony copyrighted material was copied into, or appeared in, Connectix's final product, the Virtual Game Station.

Methods (3) and (4) constitute "disassembly" of object code into source code.^[3] In each case, engineers use a program known as a "dissassembler" to translate the ones and zeros of binary machine-readable object code into the words and mathematical symbols of source code. This translated source code is similar to the source code used originally to create the object code^[4] but lacks the annotations drafted by the authors of the program that help explain the functioning of the source code. In a static examination of the computer instructions, method (3), the engineer disassembles the object code of all or part of the program. The program must generally be copied one or more times to perform disassembly. In a dynamic examination of the computer instructions, method (4), the engineer uses the disassembler program to disassemble parts of the program, one instruction at a time, while the program is running. This method also requires copying [601] the program and, depending on the number of times this operation is performed, may require additional copying of the program into RAM every time the computer is booted up.

Connectix began developing the Virtual Game Station for Macintosh on about July 1, 1998. In order to develop a PlayStation emulator, Connectix needed to emulate both the PlayStation hardware and the firmware (the Sony BIOS).

Connectix first decided to emulate the PlayStation's hardware. In order to do so, Connectix engineers purchased a Sony PlayStation console and extracted the Sony BIOS from a chip inside the console. Connectix engineers then copied the Sony BIOS into the RAM of their computers and observed the functioning of the Sony BIOS in conjunction with the Virtual Game Station hardware emulation software as that hardware emulation software was being developed by Connectix. The engineers observed the operation of the Sony BIOS through use of a debugging program that permitted the engineers to observe the signals sent between the BIOS and the hardware emulation software. During this process, Connectix engineers made additional copies of the Sony BIOS every time they booted up their computer and the Sony BIOS was loaded into RAM.

Once they had developed the hardware emulation software, Connectix engineers also used the Sony BIOS to "debug" the emulation software. In doing so, they repeatedly copied and disassembled discrete portions of the Sony BIOS.

Connectix also used the Sony BIOS to begin development of the Virtual Game Station for Windows. Specifically, they made daily copies to RAM of the Sony BIOS and used the Sony BIOS to develop certain Windows-specific systems for the Virtual Game Station for Windows. Although Connectix had its own BIOS at the time, Connectix engineers used the Sony BIOS because it contained CD-ROM code that the Connectix BIOS did not contain.

Early in the development process, Connectix engineer Aaron Giles disassembled a copy of the entire Sony BIOS that he had downloaded from the Internet. He did so for the purpose of testing a "disassembler" program he had written. The print-out of the source code was not used to develop the Virtual Game Station emulator. Connectix engineers initially used this copy of the Sony BIOS to begin the reverse engineering process, but abandoned it after realizing that it was a Japanese-language version.

During development of the Virtual Game Station, Connectix contacted Sony and requested "technical assistance" from Sony to complete the development of the Virtual Game Station. Connectix and Sony representatives met during September 1998. Sony declined Connectix's request for assistance.

Connectix completed Virtual Game Station for Macintosh computers in late December 1998 or early January 1999. Connectix announced its new product at the MacWorld Expo on January 5, 1999. At MacWorld, Connectix marketed the Virtual Game Station as a "PlayStation emulator." The materials stated that the Virtual Game Station permits users to play "their favorite Playstation games" on a computer "even if you don't yet have a Sony PlayStation console."

On January 27, 1999, Sony filed a complaint alleging copyright infringement and other causes of action against Connectix. Sony subsequently moved for a preliminary injunction on the grounds of copyright and trademark infringement. The district court granted the motion, enjoining Connectix: (1) from copying or using the Sony BIOS code in the development of the Virtual Game Station for Windows; and (2) from selling the Virtual Game Station for Macintosh or the Virtual Game [602] Station for Windows. Order on Mot. for Prelim. Inj. at 27. The district court also impounded all Connectix's copies of the Sony BIOS and all copies of works based upon or incorporating Sony BIOS. Id. at 27-28. Connectix now appeals from this order.

To prevail on its motion for injunctive relief, Sony was required to demonstrate "either a likelihood of success on the merits and the possibility of irreparable injury or that serious questions going to the merits were raised and the balance of the hardships tip sharply in its favor." Cadence Design Sys., Inc. v. Avant! Corp., 125 F.3d 824, 826 (9th Cir. 1997) (internal quotation marks and bracket omitted), cert. denied, 523 U.S. 1118 (1998). We reverse the grant of a preliminary injunction only when "the district court abused its discretion or based its decision on an erroneous legal standard or on clearly erroneous findings of fact." Roe v. Anderson, 134 F.3d 1400, 1402 n.1 (9th Cir. 1998) (internal quotation marks omitted), aff'd on other grounds, sub nom. Saenz v. Roe, 526 U.S. 489 (1999). We review the scope of injunctive relief for an abuse of discretion. SEC v. Interlink Data Network of L.A., Inc., 77 F.3d 1201, 1204 (9th Cir. 1996).

Connectix admits that it copied Sony's copyrighted BIOS software in developing the Virtual Game Station but contends that doing so was protected as a fair use under 17 U.S.C. S 107. Connectix also challenges the district court's conclusion that Sony has established a likelihood that Connectix's Virtual Game Station tarnishes the PlayStation trademark. We consider each of these claims below.

The fair use issue arises in the present context because of certain characteristics of computer software. The object code of a program may be copyrighted as expression, 17 U.S.C. S 102(a), but it also contains ideas and performs functions that are not entitled to copyright protection. See 17 U.S.C. S 102(b). Object code cannot, however, be read by humans. The unprotected ideas and functions of the code therefore are frequently undiscoverable in the absence of investigation and translation that may require copying the copyrighted material. We conclude that, under the facts of this case and our precedent, Connectix's intermediate copying and use of Sony's copyrighted BIOS was a fair use for the purpose of gaining access to the unprotected elements of Sony's software.

The general framework for analysis of fair use is established by statute, 17 U.S.C. S 107.^[5] We have applied this statute and the fair use doctrine to the disassembly of computer software in the case of Sega Enterprises Ltd. v. Accolade, Inc., 977 F.2d 1510 (9th Cir. 1993) (amended opinion). Central to our decision today is the rule set forth in Sega:

[W]here disassembly is the only way to gain access to the ideas and functional elements embodied in a copyrighted computer program and where there is a legitimate reason for seeking such access, disassembly is a fair use of the copyrighted work, as a matter of law.

Id. at 1527-28 (emphasis added). In Sega, we recognized that intermediate copying could constitute copyright [603] infringement even when the end product did not itself contain copyrighted material. Id. at 1518-19. But this copying nonetheless could be protected as a fair use if it was "necessary" to gain access to the functional elements of the software itself. Id. at 1524-26. We drew this distinction because the Copyright Act protects expression only, not ideas or the functional aspects of a software program. See id. at 1524 (citing 17 U.S.C. S 102(b)). We also recognized that, in the case of computer programs, this idea/expression distinction poses "unique problems" because computer programs are "in essence, utilitarian articles — articles that accomplish tasks. As such, they contain many logical, structural, and visual display elements that are dictated by the function to be performed, by considerations of efficiency, or by external factors such as compatibility requirements and industry demands." Id. Thus, the fair use doctrine preserves public access to the ideas and functional elements embedded in copyrighted computer software programs. This approach is consistent with the "'ultimate aim [of the Copyright Act], to stimulate artistic creativity for the general public good.'" Sony Corp. of Am. v. Universal City Studios, Inc., 464 U.S. 417, 432 (1984) (quoting Twentieth Century Music Corp. v. Aiken, 422 U.S. 151, 156 (1975)).

We turn then to the statutory fair use factors, as informed by our precedent in Sega.

Under our analysis of the second statutory factor, nature of the copyrighted work, we recognize that "some works are closer to the core of intended copyright protection than others." Campbell v. Acuff-Rose Music, Inc., 510 U.S. 569, 586 (1994). Sony's BIOS lies at a distance from the core because it contains unprotected aspects that cannot be examined without copying. See Sega, 977 F.2d at 1526. We consequently accord it a "lower degree of protection than more traditional literary works." Id. As we have applied this standard, Connectix's copying of the Sony BIOS must have been "necessary" to have been fair use. See id. at 1524-26. We conclude that it was.

There is no question that the Sony BIOS contains unprotected functional elements. Nor is it disputed that Connectix could not gain access to these unprotected functional elements without copying the Sony BIOS. Sony admits that little technical information about the functionality of the Sony BIOS is publicly available. The Sony BIOS is an internal operating system that does not produce a screen display to reflect its functioning. Consequently, if Connectix was to gain access to the functional elements of the Sony BIOS it had to be through a form of reverse engineering that required copying the Sony BIOS onto a computer.^[6] Sony does not dispute this proposition.

The question then becomes whether the methods by which Connectix reverse-engineered the Sony BIOS were necessary to gain access to the unprotected functional elements within the program. We conclude that they were. Connectix employed several methods of reverse engineering (observation and observation with partial disassembly) each of which required Connectix to make intermediate copies of copyrighted material. Neither of these methods renders fair use protection inapplicable. Sega expressly sanctioned [604] disassembly. See id. at 1527-28. We see no reason to distinguish observation of copyrighted software in an emulated computer environment. Both methods require the reverse engineer to copy protected as well as unprotected elements of the computer program. Because this intermediate copying is the gravamen of the intermediate infringement claim, see 17 U.S.C. S 106(1); Sega, 977 F.2d at 1518-19, and both methods of reverse engineering require it, we find no reason inherent in these methods to prefer one to another as a matter of copyright law. Connectix presented evidence that it observed the Sony BIOS in an emulated environment to observe the functional aspects of the Sony BIOS. When this method of reverse engineering was unsuccessful, Connectix engineers disassembled discrete portions of the Sony BIOS to view directly the ideas contained therein. We conclude that intermediate copying in this manner was "necessary" within the meaning of Sega.

We decline to follow the approach taken by the district court. The district court did not focus on whether Connectix's copying of the Sony BIOS was necessary for access to functional elements. Instead, it found that Connectix's copying and use of the Sony BIOS to develop its own software exceeded the scope of Sega. See Order at 17 ("[T]hey disassembled Sony's code not just to study the concepts. They actually used that code in the development of [their] product."). This rationale is unpersuasive. It is true that Sega referred to "studying or examining the unprotected aspects of a copyrighted computer program." 977 F.2d at 1520 (emphasis added). But in Sega, Accolade's copying, observation and disassembly of Sega's game cartridges was held to be fair use, even though Accolade "loaded the disassembled code back into a computer, and experimented to discover the interface specifications for the Genesis console by modifying the programs and studying the results." Id. at 1515. Thus, the distinction between "studying" and "use" is unsupported in Sega. Moreover, reverse engineering is a technically complex, frequently iterative process. Johnson-Laird, 19 U. Dayton L. Rev. at 843-44. Within the limited context of a claim of intermediate infringement, we find the semantic distinction between "studying" and "use" to be artificial, and decline to adopt it for purposes of determining fair use.^[7]

We also reject the argument, urged by Sony, that Connectix infringed the Sony copyright by repeatedly observing the Sony BIOS in an emulated environment, thereby making repeated copies of the Sony BIOS. These intermediate copies could not have been "necessary" under Sega, contends Sony, because Connectix engineers could have disassembled the entire Sony BIOS first, then written their own Connectix BIOS, and used the Connectix BIOS to develop the Virtual Game Station hardware emulation software. We accept Sony's factual predicate for the limited purpose of this appeal.^[8] Our doing so, however, does not aid Sony.

[605] Sony contends that Connectix's reverse engineering of the Sony BIOS should be considered unnecessary on the rationale that Connectix's decision to observe the Sony BIOS in an emulated environment required Connectix to make more intermediate copies of the Sony BIOS than if Connectix had performed a complete disassembly of the program. Under this logic, at least some of the intermediate copies were not necessary within the meaning of Sega. This construction stretches Sega too far. The "necessity" we addressed in Sega was the necessity of the method, i.e., disassembly, not the necessity of the number of times that method was applied. See 977 F.2d at 1524-26. In any event, the interpretation advanced by Sony would be a poor criterion for fair use. Most of the intermediate copies of the Sony BIOS were made by Connectix engineers when they booted up their computers and the Sony BIOS was copied into RAM. But if Connectix engineers had left their computers turned on throughout the period during which they were observing the Sony BIOS in an emulated environment, they would have made far fewer intermediate copies of the Sony BIOS (perhaps as few as one per computer). Even if we were inclined to supervise the engineering solutions of software companies in minute detail, and we are not, our application of the copyright law would not turn on such a distinction.^[9] Such a rule could be easily manipulated. More important, the rule urged by Sony would require that a software engineer, faced with two engineering solutions that each require intermediate copying of protected and unprotected material, often follow the least efficient solution. (In cases in which the solution that required the fewest number of intermediate copies was also the most efficient, an engineer would pursue it, presumably, without our urging.) This is precisely the kind of "wasted effort that the proscription against the copyright of ideas and facts . . . [is] designed to prevent." Feist Publications, Inc. v. Rural Tel. Serv. Co., 499 U.S. 340, 354 (1991) (internal quotation marks omitted). Such an approach would erect an artificial hurdle in the way of the public's access to the ideas contained within copyrighted software programs. These are "aspects that were expressly denied copyright protection by Congress." Sega, 977 F.2d at 1526 (citing 17 U.S.C. S 102(b)). We decline to erect such a barrier in this case. If Sony wishes to obtain a lawful monopoly on the functional concepts in its software, it must satisfy the more stringent standards of the patent laws. See Bonito Boats, Inc. v. Thunder Craft Boats, Inc., 489 U.S. 141, 160-61 (1989); Sega, 977 F.2d at 1526. This Sony has not done. The second statutory factor strongly favors Connectix.

With respect to the third statutory factor, amount and substantiality of the portion [606] used in relation to the copyrighted work as a whole, Connectix disassembled parts of the Sony BIOS and copied the entire Sony BIOS multiple times. This factor therefore weighs against Connectix. But as we concluded in Sega, in a case of intermediate infringement when the final product does not itself contain infringing material, this factor is of "very little weight." Sega, 977 F.2d at 152627; see also Sony Corp. of Am. v. Universal City Studios, Inc., 464 U.S. 417, 449-50 (1984) (copying of entire work does not preclude fair use).

Under the first factor, purpose and character of the use, we inquire into whether Connectix's Virtual Game Station merely supersedes the objects of the original cre ation, or instead adds something new, with a further purpose or different character, altering the first with new expression, meaning, or message; it asks, in other words, whether and to what extent the new work is "transformative."

Campbell v. Acuff-Rose Music, Inc., 510 U.S. 569, 579 (1994) (internal quotation marks and citations omitted). As an initial matter, we conclude that the district court applied an erroneous legal standard; the district court held that Connectix's commercial purpose in copying the Sony BIOS gave rise to a "presumption of unfairness that . . . can be rebutted by the characteristics of a particular commercial use." Order at 14-15 (citing Sega, 977 F.2d at 1522). Since Sega, however, the Supreme Court has rejected this presumption as applied to the first and fourth factor of the fair use analysis. Acuff-Rose, 510 U.S. at 584, 594 (clarifying Sony, 464 U.S. at 451). Instead, the fact that Connectix's copying of the Sony BIOS was for a commercial purpose is only a "separate factor that tends to weigh against a finding of fair use." Id. at 585 (internal quotation marks omitted).^[10]

We find that Connectix's Virtual Game Station is modestly transformative. The product creates a new platform, the personal computer, on which consumers can play games designed for the Sony PlayStation. This innovation affords opportunities for game play in new environments, specifically anywhere a Sony PlayStation console and television are not available, but a computer with a CD-ROM drive is. More important, the Virtual Game Station itself is a wholly new product, notwithstanding the similarity of uses and functions between the Sony PlayStation and the Virtual Game Station. The expressive element of software lies as much in the organization and structure of the object code that runs the computer as it does in the visual expression of that code that appears on a computer screen. See 17 U.S.C. S 102(a) (extending copyright protection to original works of authorship that "can be perceived, reproduced, or otherwise communicated, either directly or with the aid of a machine or device"). Sony does not claim that the Virtual Game Station itself contains object code that infringes Sony's copyright. We are therefore at a loss to see how Connectix's drafting of entirely new object code for its VGS [607] program could not be transformative, despite the similarities in function and screen output.

Finally, we must weigh the extent of any transformation in Connectix's Virtual Game Station against the significance of other factors, including commercialism, that militate against fair use. See Acuff-Rose, 510 U.S. at 579. Connectix's commercial use of the copyrighted material was an intermediate one, and thus was only "indirect or derivative." Sega, 977 F.2d at 1522. Moreover, Connectix reverse-engineered the Sony BIOS to produce a product that would be compatible with games designed for the Sony PlayStation. We have recognized this purpose as a legitimate one under the first factor of the fair use analysis. See id. Upon weighing these factors, we find that the first factor favors Connectix.

The district court ruled, however, that the Virtual Game Station was not transformative on the rationale that a computer screen and a television screen are interchangeable, and the Connectix product therefore merely "supplants" the Sony PlayStation console. Order at 15. The district court clearly erred. For the reasons stated above, the Virtual Game Station is transformative and does not merely supplant the PlayStation console. In reaching its decision, the district court apparently failed to consider the expressive nature of the Virtual Game Station software itself. Sony's reliance on Infinity Broadcast Corp. v. Kirkwood, 150 F.3d 104 (2d Cir. 1998), suffers from the same defect. The Infinity court reasoned that a "change of format, though useful, is not technically a transformation." Id. at 108 n.2. But the infringing party in that case was merely taking copyrighted radio transmissions and retransmitting them over telephone lines; there was no new expression. Id. at 108. Infinity does not change our conclusion; the purpose and character of Connectix's copying points toward fair use.

We also find that the fourth factor, effect of the use upon the potential market, favors Connectix. Under this factor, we consider

not only the extent of market harm caused by the particular actions of the alleged infringer, but also "whether unrestricted and widespread conduct of the sort engaged in by the defendant . . . would result in a substantially adverse impact on the potential market" for the original.

Acuff-Rose, 510 U.S. at 590 (quoting 3 M. Nimmer & D. Nimmer, Nimmer on Copyright, S 13.05[A][4], at 13-102.61 (1993)). Whereas a work that merely supplants or supersedes another is likely to cause a substantially adverse impact on the potential market of the original, a transformative work is less likely to do so. See id. at 591; Harper & Row, Publishers, Inc. v. Nation Enters, Inc., 471 U.S. 539, 567-69 (1985).

The district court found that "[t]o the extent that such a substitution [of Connectix's Virtual Game Station for Sony PlayStation console] occurs, Sony will lose console sales and profits." Order at 19. We recognize that this may be so. But because the Virtual Game Station is transformative, and does not merely supplant the PlayStation console, the Virtual Game Station is a legitimate competitor in the market for platforms on which Sony and Sony-licensed games can be played. See Sega, 977 F.2d at 1522-23. For this reason, some economic loss by Sony as a result of this competition does not compel a finding of no fair use. Sony understandably seeks control over the market for devices that play games Sony produces or licenses. The copyright law, however, does not confer such a monopoly. See id. at 1523-24 ("[A]n attempt to monopolize the market by making it impossible for others to compete runs counter to the statutory purpose of promoting creative [608] expression and cannot constitute a strong equitable basis for resisting the invocation of the fair use doctrine."). This factor favors Connectix.

The four statutory fair use factors must be "weighed together, in light of the purposes of copyright." Acuff-Rose, 510 U.S. at 578. Here, three of the factors favor Connectix; one favors Sony, and it is of little weight. Of course, the statutory factors are not exclusive, Harper & Row, 471 U.S. at 560, but we are unaware of other factors not already considered that would affect our analysis. Accordingly, we conclude that Connectix's intermediate copying of the Sony BIOS during the course of its reverse engineering of that product was a fair use under 17 U.S.C. S 107, as a matter of law. With respect to its claim of copyright infringement, Sony has not established either a likelihood of success on the merits or that the balance of hardships tips in its favor. See Cadence Design Sys., Inc. v. Avant! Corp., 125 F.3d 824, 826 (9th Cir. 1997), cert. denied, 523 U.S. 1118 (1998). Accordingly, we need not address defenses asserted by Connectix under 17 U.S.C. S 117(a)(1) and our doctrine of copyright misuse. We reverse the district court's grant of a preliminary injunction on the ground of copyright infringement.^[11]

The district court found that Connectix's sale of the Virtual Game Station tarnished Sony's "PlayStation" mark under 15 U.S.C. S 1125(c)(1). The district court based its preliminary injunction, however, exclusively on Sony's copyright claim, and did not cite its tarnishment finding as a ground for the injunction. Although we can "affirm the district court on any ground supported by the record," Charley's Taxi Radio Dispatch Corp. v. SIDA of Haw., Inc., 810 F.2d 869, 874 (9th Cir. 1987), we decline to affirm on this alternative ground. Sony has not shown a likelihood of success on each element of the tarnishment claim.

To prevail on its tarnishment claim, Sony must show that (1) the PlayStation "mark is famous;" (2) Connectix is "making a commercial use of the mark;" (3) Connectix's "use began after the mark became famous;" and (4) Connectix's "use of the mark dilutes the quality of the mark by diminishing the capacity of the mark to identify and distinguish goods and services." Films of Distinction, Inc. v. Allegro Film Prods., Inc., 12 F. Supp. 2d 1068, 1078 (C.D. Cal. 1998); 15 U.S.C. SS 1125(c)(1), 1127 (definition of "dilution"). Connectix does not dispute the first and third of these elements. We address only the fourth element.

Because Sony proceeds under a tarnishment theory of dilution, it must show under this fourth element that its PlayStation mark will "suffer negative associations" through Connectix's use. Hormel Foods Corp. v. Jim Henson Prods., Inc., 73 F.3d 497, [609] 507 (2d Cir. 1996); see also 4 J. Thomas McCarthy, McCarthy on Trademarks and Unfair Competition S 24.95 (4th ed. 1996 & Supp. 1999). The district court found the Virtual Game Station does not play PlayStation games as well as the PlayStation console, and that although the Virtual Game Station's packaging contains a disclaimer to this effect, "game players do not comprehend this distinction." Order at 24-25. The Sony PlayStation mark therefore suffers negative associations because of this confusion on the part of consumers who play Sony games on the Virtual Game Station software. Id. at 25.

The evidence on the record does not support such a finding of misattribution. The district court relied primarily on a series of semi-anonymous reviews posted on the Internet and submitted by Connectix. As the district court acknowledged, these reviews were neither authenticated nor identified. More important, the print-out of the comments does not reveal the context in which the comments were made; this omission makes the extent of any confusion by game players difficult to assess reliably. The district court also referred to two focus group studies conducted by market research firms at Sony's bequest. These studies address the difference of quality between the Virtual Game Station and PlayStation, but shed no light on the question of misattribution. Thus, we reject as clearly erroneous the district court's finding that the Virtual Game Station tarnishes the Sony PlayStation mark on a misattribution theory of tarnishment.

Nor are we persuaded by Sony's argument that the difference in quality between the two platforms is itself sufficient to find tarnishment. See Deere & Co. v. MTD Prods, Inc., 41 F.3d 39, 43 (2d Cir. 1994) ("'Tarnishment' generally arises when the plaintiff's trademark is linked to products of shoddy quality," diminishing the value of the mark "because the public will associate the lack of quality . . . with the plaintiff's unrelated goods."). Even if we assume, without deciding, that the concept of tarnishment is applicable to the present factual scenario, there is insufficient evidence to support a finding of tarnishment. "The sine qua non of tarnishment is a finding that plaintiff's mark will suffer negative associations through defendant's use." Hormel Foods, 73 F.3d at 507. The evidence here fails to show or suggest that Sony's mark or product was regarded or was likely to be regarded negatively because of its performance on Connectix's Virtual Game Station. The evidence is not even substantial on the quality of that performance. The Sony studies, each of included eight participants, presented a range of conclusions. One study concluded that "[o]n balance, the results of this focus group study show that the testers preferred the PlayStation gaming experience over the Virtual Game Station gaming experience." The other concluded that consumers found the Virtual Game Station was "generally acceptable" for one game, but "nearly unplayable" on another. The internet reviews submitted by Connectix also presented a range of opinion; while some anonymous reviewers loved the Virtual Game Station, some were ambivalent, and a relative few hated the Virtual Game Station emulation. In the only review for attribution, Newsweek said the software played "surprisingly well," and that some games on the Virtual Game Station "rocked." Steven Levy, "Play it Your Way," Newsweek, Mar. 15, 1999, at 84. This evidence is insufficient to support a conclusion that the shoddiness of the Virtual Game Station alone tarnishes the Sony mark. Sony's tarnishment claim cannot support the injunction.

Connectix's reverse engineering of the Sony BIOS extracted from a Sony PlayStation console purchased by Connectix engineers is protected as a fair use. Other intermediate copies of the Sony BIOS made by Connectix, if they infringed Sony's copyright, do not justify injunctive relief. For these reasons, the district [610] court's injunction is dissolved and the case is remanded to the district court. We also reverse the district court's finding that Connectix's Virtual Game Station has tarnished the Sony PlayStation mark.

REVERSED AND REMANDED.

[1] Any purchaser of a copyrighted software program must copy the program into the memory of a computer in order to make any use at all of the program. For that reason, 17 U.S.C. S 117(a)(1) provides that it shall not be an infringement for one who owns a software copy to make another copy "created as an essential step in the utilization of the computer program in conjunction with a machine and that it is used in no other manner." Connectix contends that its copying is within the protection of section 117, but our disposition of the fair use issue makes it unnecessary for us to address that contention. See Sega, 977 F.2d at 1517-18 (rejecting contention that disassembly is protected by section 117).

[2] Object code is binary code, consisting of a series of the numerals zero and one, readable only by computers.

[3] Source code is readable by software engineers, but not by computers.

[4] Software is generally written by programmers in source code (and in other more conceptual formats) and then assembled into object code.

[5] The factors for determining fair use 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.

17 U.S.C. S 107.

[6] Connectix offers evidence that it attempted to gain access to the functionality of the Sony BIOS by attaching a "logic analyzer" to the input and output leads of the chip on which the Sony BIOS was located within the PlayStation console. This form of observation does not appear to require the making of an intermediate copy, but was of limited value because it permitted the observation of inter-chip, but not intra-chip signals. Sony does not suggest that this form of observation alone would have permitted Connectix engineers to gain access to the functional elements of the Sony BIOS.

[7] We are unable to locate evidence in the record to support the district court's finding that Connectix "gradually convert[ed] Sony's code to their own code," Order at 11, if by this statement the court meant that Connectix engineers failed to create an original work. True, Connectix engineers admitted to combining the Sony BIOS with the Virtual Game Station hardware emulation software to test and develop the hardware emulation software. But in drafting the Connectix BIOS, Connectix engineers never claimed to do anything other than write their own code, even though they used, observed, copied and sometimes disassembled the Sony BIOS as they did so. Sony presents no evidence to the contrary, nor does Sony contend that Connectix's final product contains infringing material.

[8] The depositions of Connectix engineers Aaron Giles and Eric Traut suggest that Connectix engineers recognized that other engineering solutions were sometimes available.

With respect to the observation of the Sony BIOS in an emulated environment, Traut admitted that it was easier to use the Sony BIOS to develop the hardware emulation software than to develop Connectix own BIOS first, and then use the Connectix BIOS to develop the hardware emulation software.

With respect to the observation of the Sony BIOS with selective disassembly of the code, Traut stated with respect to one bug that there would have been no way to fix the bug without disassembling a portion of the Sony BIOS. He also stated that at other times he disassembled portions of the Sony BIOS when doing so was "the most efficient way of finding that bug." In a subsequent question, he clarified that disassembly was not the only way to fix the bug, just the fastest way to do so.

With respect to Connectix's observation of the Sony BIOS in the development of the Virtual Game Station for Windows, other solutions, presumably disassembly, may have been possible. Connectix engineer Giles responded "I don't know" when asked by Sony counsel if "it would have been possible to write the CD-ROM code before building the emulator."

[9] Sony relies on these RAM copies for its contention, which we reject, that there is no significant difference between the facts of this case and our decisions in Triad Systems Corp. v. Southeastern Express Co., 64 F.3d 1330 (9th Cir. 1995) and MAI Systems Corp. v. Peak Computer, Inc., 991 F.2d 511 (9th Cir. 1993). Those cases are inapposite to our fair use analysis. Neither involved reverse engineering of software to gain access to unprotected functional elements.

[10] Sony points to Micro Star v. Formgen, Inc., 154 F.3d 1107 (9th Cir. 1998), for the proposition that commercial use creates a presumption of unfairness. See id. at 1113 (quoting Sony Corp. of Am. v. Universal City Studios, Inc., 464 U.S. 417, 451 (1984)). We do not read Micro Star that way; moreover, such a reading would be contrary to Acuff-Rose. AcuffRose expressly rejected such a "hard evidentiary presumption" and stated that the Court of Appeals "erred" by giving such dispositive weight to the commercial nature of the use. 510 U.S. at 584. Also, Micro Star itself involved a use that was non-transformative, which is not the case here. See Micro Star, 154 F.3d at 1113 & n.6. Cf. American Geophysical Union v. Texaco, Inc., 60 F.3d 913, 921-22 (2d Cir. 1995) (amended opinion) (rejecting, on grounds of Acuff-Rose and collected cases, presumption of unfairness for commercial use as applied to Texaco's intermediate copying of copyrighted articles).

[11] We do not accept Sony's argument that the downloading of Sony's BIOS from the Internet was itself an infringement justifying the injunction. The evidence of record suggests that the downloaded BIOS played a minimal role, if any, in development of the Virtual Game Station. We conclude that, on this record, the downloading infringement, if such it was, would not justify our upholding the injunction on the development and sale of the Virtual Game Station. The Virtual Game Station itself infringes no copyright. Bearing in mind the goals of the copyright law, "to stimulate artistic creativity for the general public good," Sony, 464 U.S. at 432 (internal quotation marks omitted), we conclude that there is a legitimate public interest in the publication of Connectix's software, and that this interest is not overborne by the record evidence related to the downloaded BIOS. The imposition of an injunction is discretionary. See 17 U.S.C. S 502(a). On this record, we conclude that it would be inappropriate to uphold the injunction because of Connectix's copying and use of the downloaded Sony BIOS; damages would adequately protect Sony's interest with respect to that alleged infringement. See Acuff-Rose, 510 U.S. at 578 n.10 (discussing factors to be evaluated in deciding whether to enjoin product found to have exceeded bounds of fair use).