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 the market by making it impossible for others to compete runs counter to the statutory purpose of promoting creative expression and cannot constitute a strong equitable basis for resisting the invocation of the fair use doctrine. Thus, we conclude that the fourth statutory factor weighs in Accolade’s, not Sega’s, favor, notwithstanding the minor economic loss Sega may suffer.

The second statutory factor, the nature of the copyrighted work, reflects the fact that not all copyrighted works are entitled to the same level of protection. The protection established by the Copyright Act for original works of authorship does not extend to the ideas underlying a work or to the functional or factual aspects of the work. 17 U.S.C. § 102(b). To the extent that a work is functional or factual, it may be copied, Baker v. Selden, 101 U.S. (11 Otto) 99, 102–04, 25 L.Ed. 841 (1879), as may those expressive elements of the work that “must necessarily be used as incident to” expression of the underlying ideas, functional concepts, or facts, id. at 104. Works of fiction receive greater protection than works that have strong factual elements, such as historical or biographical works, Maxtone-Graham, 803 F.2d at 1263 (citing Rosemont Enterprises, Inc. v. Random House, Inc., 366 F.2d 303, 307 (2d Cir.1966), cert. denied, 385 U.S. 1009, 87 S.Ct. 714, 17 L.Ed.2d 546 (1967)), or works that have strong functional elements, such as accounting textbooks, Baker, 101 U.S. at 104. Works that are merely compilations of fact are copyrightable, but the copyright in such a work is “thin.” Feist Publications, –499 [sic] U.S. —, 111 S.Ct at 1289.

Computer programs pose unique problems for the application of the “idea/expression distinction” that determines the extent of copyright protection. To the extent that there are many possible ways of accomplishing a given task or fulfilling a particular market demand, the programmer’s choice of program structure and design may be highly creative and idiosyncratic. However, 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. ''Computer Assoc. Int’l, Inc. v. Altai, Inc., 1992 WL 372273, 23 U.S.P.Q.2d (BNA) 1241, 1253–56 (2d Cir.1992) (“CAI''”). In some circumstances, even the exact set of commands used by the programmer is deemed functional rather than creative for purposes of copyright. “[W]hen specific instructions, even though previously copyrighted, are the only and essential means of accomplishing a given task, their later use by another will not amount to infringement.” CONTU Report at 20; see CAI, 23 U.S.P.Q.2d at 1254.

Because of the hybrid nature of computer programs, there is no settled standard for identifying what is protected expression and what is unprotected idea in a case involving the alleged infringement of a copyright in computer software. We are in wholehearted agreement with the Second Circuit’s recent observation that “[t]hus far, many of the decisions in this area reflect the courts’ attempt to fit the proverbial square peg in a round hole.” CAI, 23 U.S.P.Q.2d at 1257. In 1986, the Third Circuit attempted to resolve the dilemma by suggesting that the idea or function of a