Detailed Answer
(a) Computer software is covered under the general
copyright laws and is therefore usually copyrightable as an expression
of ideas. Answer (b) is incorrect because copyrights in
general do not need a copyright notice for works published after
March 1, 1989. Answer (c) is incorrect because a recent court
ruled that programs in both source codes, which are human readable,
and in machine readable object code can be copyrighted.
Answer (d) is incorrect because copyrights taken out by corporations
or businesses are valid for 100 years from creation of the
copyrighted item or seventy-five years from its publication,
whichever is shorter.
