15 lines
2.5 KiB
HTML
15 lines
2.5 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>PDP-20</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../P.html" title="P"/><link rel="previous" href="PDP-11.html" title="PDP-11"/><link rel="next" href="PEBKAC.html" title="PEBKAC"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">PDP-20</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="PDP-11.html">Prev</a> </td><th width="60%" align="center">P</th><td width="20%" align="right"> <a accesskey="n" href="PEBKAC.html">Next</a></td></tr></table><hr/></div><dt><a id="PDP-20"/><dt xmlns="" id="PDP-20"><b>PDP-20</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> The most famous computer that never was.
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<a href="PDP-10.html"><i class="glossterm">PDP-10</i></a> computers running the
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<a href="../T/TOPS-10.html"><i class="glossterm">TOPS-10</i></a> operating system were labeled
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‘DECsystem-10’ as a way of differentiating them from the
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<a href="PDP-11.html"><i class="glossterm">PDP-11</i></a>. Later on, those systems running
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<a href="../T/TOPS-20.html"><i class="glossterm">TOPS-20</i></a> were labeled ‘DECSYSTEM-20’ (the
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block capitals being the result of a lawsuit brought against DEC by Singer,
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which once made a computer called ‘system-10’), but contrary to
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popular lore there was never a ‘PDP-20’; the only difference
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between a 10 and a 20 was the operating system and the color of the paint.
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Most (but not all) machines sold to run TOPS-10 were painted ‘Basil
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Blue’, whereas most TOPS-20 machines were painted ‘Chinese
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Red’ (often mistakenly called orange).</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="PDP-11.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../P.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="PEBKAC.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">PDP-11 </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> PEBKAC</td></tr></table></div></body></html>
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