. . . . . "Groff"@en . . "Groff (pronounced \"gee-roff\") is the GNU replacement for the troff and nroff text formatters. It is an original implementation written primarily in C++ by James Clark and is modeled after ditroff, including many extensions. The first version, 0.3.1, was released June 1990. The first stable version, 1.04, was announced in November 1991."@en . . "yes" .