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groff: Output device intro
groff: Introduction
1.7 Credits
===========
Large portions of this manual were taken from existing documents, most
notably, the manual pages for the 'groff' package by James Clark, and
Eric Allman's papers on the 'me' macro package.
The section on the 'man' macro package is partly based on Susan G.
Kleinmann's 'groff_man' manual page written for the Debian GNU/Linux
system.
Larry Kollar contributed the section in the 'ms' macro package.