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<title>What Is groff? (The GNU Troff Manual)</title>
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Next: <a href="groff-Capabilities.html" accesskey="n" rel="next"><code class="code">groff</code> Capabilities</a>, Previous: <a href="Introduction.html" accesskey="p" rel="prev">Introduction</a>, Up: <a href="Introduction.html" accesskey="u" rel="up">Introduction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p>
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<h3 class="section" id="What-Is-groff_003f-1">1.2 What Is <code class="code">groff</code>?</h3>
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<a class="index-entry-id" id="index-groff_002d_002d_002dwhat-is-it_003f"></a>
<p><code class="code">groff</code> (GNU <code class="code">roff</code>) is a typesetting system that reads plain
text input files that include formatting commands to produce output in
PostScript, PDF, HTML, DVI, or other formats, or for display to a
terminal. Formatting commands can be low-level typesetting primitives,
macros from a supplied package, or user-defined macros. All three
approaches can be combined.
</p>
<p>A reimplementation and extension of the typesetter from <abbr class="acronym">AT&T</abbr>
Unix, <code class="code">groff</code> is present on most <abbr class="acronym">POSIX</abbr> systems owing to
its long association with Unix manuals (including man pages). It and
its predecessor are notable for their production of several best-selling
software engineering texts. <code class="code">groff</code> is capable of producing
typographically sophisticated documents while consuming minimal system
resources.
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