The several different types of works, which can be protected under the Copyright law, are divided into the following categories:

  1. Any short phrase, slogan, title, or other material of an identifying nature. These may more appropriately be protected as trademark or service mark.
  2. Non-original information. Examples are calendars, standard math tables, standard weight/measure conversion tables, and directories. However, such works can be copyrighted if they contain substantial original material, such as illustrations or explanatory text.
  3. Ideas, systems, processes, methods or procedures. The text or other descriptive material expressing such ideas may be copyrighted. However, the ideas themselves are not protected by copyrighting the expression of the idea. Such concepts, if new and useful, may be protectable under the patent laws.
  4. Unfixed works. These include works such as speeches and lectures, which have not been recorded or printed.