When computer software automatically generates output that is not identical to its owntext, some of which is potentially copyrightable and some of which is not, difficult problemsarise in deciding to whom ownership rights in the output should be allocated. Applying thetraditional authorship tests of copyright law does not yield a clear solution to this problem. Inthis Article, Professor Samuelson argues that allocating rights in computer-generated outputto the user of the generator program is the soundest solution to the dilemma because it is theone most compatible with traditional doctrine and the policies that underlie copyright law.