Guide to Unix/Commands/roff

roff was a predecessor of troff and nroff typesetting or formatting command-line tools. These tools are noted by their use by the man command. They do not seem to be covered by POSIX.

groff is a GNU's free replacement for troff and nroff.

Links

 * troff manual page, man.cat-v.org
 * groff(1) manual page, freebsd.org
 * roff(7) manual page, freebsd.org
 * GNU Troff (Groff) Manuals Online, gnu.org
 * The Text Processor for Typesetters, troff.org
 * troff/nroff quick reference, quut.com
 * Roff (computer program)
 * Troff
 * Nroff