Broderbund Software Inc. v. Unison World, Inc., 648 F. Supp. 1127, 1133 (N.D. Cal. 1986), was a United States District Court for the Northern District of California software case, initially important in determining how U.S. copyright law applied to the look and feel presented by a software product. It took an expansive position which later courts increasingly rejected. Background Broderbund Software developed The Print Shop, a program to produce signs and greeting cards, running on Apple II computers. Broderbund started discussions with Unison World about creating a version that would run on IBM PC compatibles. The two companies could not agree on a contract, but Unison World went ahead and developed an IBM PC product with similar function and a similar user interface. Broderbund sued for infringement of their copyright. In defense, Unison invoked the merger doctrine, arguing that the idea behind the user interface could not be separated from its expression, so could not be protected by copyright. Decision The court referred to Whelan v. Jaslow, which had earlier that year established the principle that the structure, sequence and organization of a computer program could be subject to copyright (software copyright). Whelan had declared that, "the purpose or function of a utilitarian work would be the work's idea, and everything that is not necessary to that purpose or function would be part of the expression of the idea ... Where there are various means of achieving the desired purpose, then the particular means chosen is not necessary to the purpose; hence, there is expression, not idea." The court rejected "defendant's argument that the overall structure, sequencing, and arrangement of screens in [the program] fall outside the ambit of copyright protection." The court introduced the idea of the "total concept and feel" of a software work. The court said, "the idea of 'Print Shop' is the creation of greeting cards, banners, posters and signs that contain infinitely variable combinations of text, graphics and borders. A rival software publisher is completely free to market a program with the same underlying idea, but it must express the idea through a substantially different structure." The display was held copyrightable since it contained "aesthetically pleasing artwork, an entertaining layout and display, and a high degree of stylistic creativity." This case found that copyright registration of a computer program implicitly covers registration of screen displays. Consequences According to one author, "the Broderbund court has paved