groff is a text markup language created in 1990.

Groff (GNU troff) is a typesetting system that reads plain text mixed with formatting commands and produces formatted output. Output may be PostScript or PDF, html, or ASCII/UTF8 for display at the terminal. Formatting commands may be either low-level typesetting requests (“primitives”) or macros from a supplied set. Users may also write their own macros. All three may be combined.

• groff website
• groff Wikipedia page
• groff docs
• groff first developed in GNU Project
• file extensions for groff include [1-9], man, 1p and 3pm
• The Google BigQuery Public Dataset GitHub snapshot shows 20k users using groff in 26k repos on GitHub
• There are 357 members in the groff subreddit
• Pygments supports syntax highlighting for groff
• See also: (1 related languages)Troff