These are interesting questions. If you write instructions you have the copyright to them. A computer program is a set of instructions for the computer. So whoe

These are interesting questions. If you write instructions you have the copyright to them. A computer program is a set of instructions for the computer. So whoever wrote the program has the copyright, right? But whoever performs those instructions should have the copyright to the "performance" I think. So in principle I could think that the computer performs the instructions and thus can have the copyright to the "performance" but not to the instructions. I'm thinking about music, and "scores" written by composers, but performed by musicians. An interesting special case is https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3 https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3 . Do the performers have a copyright to the performance when they are following the instructions/score which says "do nothing". :-)