интерфейс для системы форматирования документов GNU roff (front end to the GNU roff document formatting system)
Описание (Description)
groff is the primary front end to the GNU roff document
formatting system. GNU roff transforms text input files into
typeset output in a variety of formats, such as PDF and HTML. It
is also used to format man pages for viewing on terminals. The
groff command orchestrates the execution of preprocessors, the
loading of macro packages, the formatting of input documents, and
the production of output appropriate to a variety of hardware
devices and file formats.