deliver: deliver e-mail to local users [recommended] groff: text formatting utilities. [optional] groff: the groff package is used to "compile" man pages stored groff: in groff/nroff format. These type of man pages would be groff: found in /usr/man/man?. All the man pages in this system groff: have been preprocessed and then GNU zipped and placed in groff: the /usr/man/cat? directories. groff is *not* needed to groff: use any of these included man pages. perl: Larry Wall's interpreted systems language [optional] binutils: C compiler utilities [recommended] clisp: a Common Lisp interpreter [optional]