Copyright law protects original creative works such as literature, art, music, films, and software. It grants creators exclusive rights over their work, usually for a limited time, including rights to copy, distribute, adapt, and financially profit from the work. Fair use allows limited use of copyrighted works for purposes like criticism, commentary, news reporting, teaching, and research. Infringing on a copyright can result in fines of up to $150,000 per work. Works enter the public domain when copyright expires or if created by the US government. To register a copyright, submit an application, fee, and copies of the work to the US Copyright Office.