The document discusses United States copyright law. It states that copyright protects original works of authorship fixed in a tangible medium, including literary works, music, art, films, and more. Works must be fixed in a tangible form to be protected. Copyright does not protect ideas, systems, government works, or works in the public domain. The copyright owner is usually the creator, their heirs, or whoever they assign rights to. Copyright infringement involves using a copyrighted work without permission by reproducing, distributing, or making derivatives of it. Examples of infringement by teachers and students are provided.