Asset Marketing Systems, Inc. v. Gagnon
542 F.3d 748 (9th Cir. 2008), cert. denied, 129 S. Ct. 2442 (2009) - full text opinion
The parties in this case fought over who had rights to the source code for the software that Mister Computer created for Asset Marketing Systems. The source code is the language that tells a program what to do and is readable by humans.