The document provides an introduction to copyright law in the United States. It discusses that the Copyright Act of 1976 established copyright protection for original works fixed in a tangible form for a limited time. It also discusses what types of works are protected under copyright (literary, musical, etc.), exceptions for fair use, how registration provides additional protections, and penalties for infringement. The case study discusses a 2000 court case where movie studios successfully sought an injunction against the distribution of a program that decrypted copy-protected DVDs without permission.