This document provides an overview of copyright concepts including public domain, orphan works, fair use, the TEACH Act, and getting permission to use copyrighted materials. It discusses how libraries are helping make more works available in the public domain through digitization. Fair use allows some use of copyrighted content for purposes like teaching without permission as long as the four fair use factors are considered. The TEACH Act clarifies what educational uses are allowed for distance learning. Getting explicit permission from the copyright holder is needed if the use is outside of fair use or exceptions like the TEACH Act. The full copyright course this overview is from can be found online at the provided URL.