66 lines
2.5 KiB
HTML
66 lines
2.5 KiB
HTML
<!-- Creator : groff version 1.24.1 -->
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<!-- CreationDate: Mon Mar 16 21:28:01 2026 -->
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<meta name="Content-Style" content="text/css">
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<style type="text/css">
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p { margin-top: 0; margin-bottom: 0; vertical-align: top }
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pre { margin-top: 0; margin-bottom: 0; vertical-align: top }
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table { margin-top: 0; margin-bottom: 0; vertical-align: top }
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h1 { text-align: center }
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</style>
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<title>pic-22.html</title>
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</head>
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<hr>
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[ <a href="pic-21.html">prev</a> | <a href="pic-23.html">next</a> | <a href="pic.html">top</a> ]
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<hr>
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<h2>22. History and Acknowledgements
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<a name="22. History and Acknowledgements"></a>
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</h2>
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<p style="margin-top: 1em">Original <b>pic</b> was written
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to go with Joseph Ossanna’s original <i>troff</i>(1)
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by Brian Kernighan, and later re-written by Kernighan with
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substantial enhancements (apparently as part of the
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evolution of <i>troff</i>(1) into <i>ditroff</i>(1) to
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generate device-independent output).</p>
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<p style="margin-top: 1em">The language had been inspired
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by some earlier graphics languages including <b>ideal</b>
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and <b>grap</b>. Kernighan credits Chris van Wyk (the
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designer of <b>ideal</b>) with many of the ideas that went
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into <b>pic</b>.</p>
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<p style="margin-top: 1em">The <b>pic</b> language was
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originally described by Brian Kernighan in Bell Labs
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Computing Science Technical Report #116 (you can obtain a
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PostScript copy of the revised version, [1], by sending a
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mail message to <i>netlib@research.att.com</i> with a body
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of ‘send 116 from research/cstr’). There have
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been two revisions, in 1984 and 1991.</p>
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<p style="margin-top: 1em">The document you are reading
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effectively subsumes Kernighan’s description; it was
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written to fill in lacunæ in the exposition and
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integrate in descriptions of the GNU <i>gpic</i>(1) and
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<i>pic2plot</i>(1) features.</p>
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<p style="margin-top: 1em">The GNU <b>gpic</b>
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implementation was written by James Clark
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⟨<i>jjc@jclark.com</i>⟩.</p>
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<p style="margin-top: 1em">The GNU <b>pic2plot</b>
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implementation is based on James Clark’s parser code
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and maintained by Robert Maier, principal author of
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<b>plotutils</b>.</p>
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<hr>
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[ <a href="pic-21.html">prev</a> | <a href="pic-23.html">next</a> | <a href="pic.html">top</a> ]
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<hr>
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