of a machine or device. Works of authorship include the following
categories:

(1) literary works;
(2) musical works, including any accompanying words;
(3) dramatic works, including any accompanying music;
(4) pantomimes and choreographic works;
(5) pictorial, graphic, and sculptural works;
(6) motion pictures and other audiovisual works;
(7) sound recordings; and
(8) architectural works.
(b) In no case does copyright protection for an original work of
authorship extend to any idea, procedure, process, system, method of
operation, concept, principle, or discovery, regardless of the form in
which it is described, explained, illustrated, or embodied in such work.


Section 103. Subject matter of copyright: Compilations and derivative
works

(a) The subject matter of copyright as specified by section 102 includes
compilations and derivative works, but protection for a work employing
preexisting material in which copyright subsists does not extend to any
part of the work in which such material has been used unlawfully.

(b) The copyright in a compilation or derivative work extends only to
the material contributed by the author of such work, as distinguished
from the preexisting material employed in the work, and does not imply
any exclusive right in the preexisting material. The copyright in such
work is independent of, and does not affect or enlarge the scope,