Program: A set of instructions, given to the computer, describing
the sequence of steps the computer performs in order to accomplish a
specific task. The task must be specific, such as balancing your
checkbook or editing your text. A general task, such as working for
world peace, is something we can all do, but not something we can
currently write programs to do.
-- From Unix User's Manual Manual, Supplementary Documents, p. 14-3: