groff(1) on Linux
The text 8420d4b2fa48, as Debian 3.1 (Sarge) shipped it.
front-end for the groff document formatting system
Flags it lists
-
--help -
--version -
-C -
-E -
-G -
-N -
-P -
-R -
-S -
-U -
-V -
-X -
-Z -
-a -
-b -
-c -
-e -
-g -
-h -
-i -
-l -
-option -
-p -
-s -
-t -
-v -
-z