4.4BSD snapshot (revision 8.1); add 1993 to copyright
remove author section
macro and text revision (-mdoc version 3)
intro(3M) => math(3M), move see also's to end
new from Kahan
Revision by Prof. Kahan.
From Prof. Kahan
4.3BSD beta release manual page
manual page distributed with 4.2BSD
manual page distributed with 4.1BSD