This document provides an overview of US copyright law. It defines copyright as protection for original creative works like writing, art, and music. Copyright law aims to encourage more creative works by compensating authors. Almost all tangible works are automatically copyrighted with some exceptions. Works enter the public domain when copyright expires or the creator assigns it. Educators can use limited portions of copyrighted works for teaching under fair use guidelines. The document also discusses copyright on the internet and provides references for further information.