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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>CTSS</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="../C.html" title="C"/><link rel="previous" href="cthulhic.html" title="cthulhic"/><link rel="next" href="cube.html" title="cube"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">CTSS</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="cthulhic.html">Prev</a> </td><th width="60%" align="center">C</th><td width="20%" align="right"> <a accesskey="n" href="cube.html">Next</a></td></tr></table><hr/></div><dt><a id="CTSS"/><dt xmlns="" id="CTSS"><b>CTSS</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="pronunciation">/C·T·S·S/</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> Compatible Time-Sharing System. An early (1963) experiment in the
design of interactive timesharing operating systems, ancestral to
<a href="../M/Multics.html"><i class="glossterm">Multics</i></a>, <a href="../U/Unix.html"><i class="glossterm">Unix</i></a>, and
<a href="../I/ITS.html"><i class="glossterm">ITS</i></a>. The name <a href="../I/ITS.html"><i class="glossterm">ITS</i></a>
(Incompatible Time-sharing System) was a hack on CTSS, meant both as a joke
and to express some basic differences in philosophy about the way I/O
services should be presented to user programs. See
<a href="../T/timesharing.html"><i class="glossterm">timesharing</i></a></p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="cthulhic.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../C.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="cube.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">cthulhic </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> cube</td></tr></table></div></body></html>