This document provides information about copyright including what can be copyrighted, fair use guidelines, public domain works, orphaned works, creative commons licensing as an alternative to copyright, registering copyrights with the US Copyright Office, and licensing copyrighted works. Key points covered include that copyright protects original fixed works, fair use considers the work's character, market effect, nature and amount used, public domain works are those whose copyright has expired or whose author is unknown, and creative commons offers open licensing for media and other works.