Certain types of works are not eligible for copyright protection. These include:
- Ideas, theories, concepts
- Procedures, methods, processes
- Titles, names, short phrases and slogans, familiar symbols or designs, variations of type styles, lists of ingredients
- Facts
- Works consisting entirely of information that is common property and containing no original authorship (e.g. standard calendars, height and weight charts, tables taken from public documents)
- Works of the U.S. government
These works are in the public domain, meaning they are freely available for use without copyright restrictions.
