troff
This manual documents GNU troff
version 1.23.0.
Copyright © 1994–2023 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”.
groff
troff
Reference
troff
and nroff
Modesgtroff
Internals