In the USA, while copyright protection is extensive, certain types of works are excluded. Copyright does not extend to mere ideas, concepts, methods, systems, or procedures, as the law only protects the specific expression of ideas, not the ideas themselves. Additionally, works that are not fixed in a tangible medium, such as unrecorded performances or oral presentations, do not qualify for copyright protection. Official texts, such as legislative, administrative, and judicial documents, and their official translations, are also excluded from copyright protection. Furthermore, simple facts, news reports, and works that are in the public domain are not protected under U.S. copyright law.