Troff

troff f is the major component of a document processing system developed by AT&T Corporation for the Unix operating system. troff features commands to designate fonts, spacing, paragraphs, margins, footnotes and more. Unlike many other text formatters, troff can position characters arbitrarily on a page, even overlapping them, and has a fully prog...
Found on http://en.wikipedia.org/wiki/Troff

troff

Format documents, see Section 8.1.2.
Found on http://www.tldp.org/LDP/intro-linux/html/gloss.html

Troff

Troff is a UNIX formatting and phototypesetting program, written originally in PDP-11 assembler and then in barely-structured early C by the late Joseph Ossanna, modelled after the earlier ROFF which was in turn modelled after Multics' RUNOFF by Jerome Saltzer (that name came from the expression 'to run off a copy'). A companion program, 'nroff', f...
Found on http://www.probertencyclopaedia.com/browse/GT.HTM
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