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4 definitions found
 for CTSS
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :

  CTSS
         Compatible Time Sharing System (Unix, predecessor, OS, MIT)
         

From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :

  CTSS
         Cray TimeSharing System (OS, Cray, LLNL)
         

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  CTSS
   /C?T?S?S/, n.
  
      Compatible Time-Sharing System. An early (1963) experiment in the design of
      interactive timesharing operating systems, ancestral to Multics, Unix,
      and ITS. The name ITS (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 timesharing
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  Compatible Timesharing System
  CTSS
  
      (CTSS) One of the earliest (1963)
     experiments in the design of interactive time-sharing
     operating systems.  CTSS was ancestral to Multics, Unix,
     and ITS.  It was developed at the MIT Computation Center
     by a team led by Fernando J. Corbato.  CTSS ran on a modified
     IBM 7094 with a second 32K-word bank of memory, using two
     2301 drums for swapping.  Remote access was provided to up
     to 30 users via an IBM 7750 communications controller
     connected to dial-up modems.
  
     The name ITS (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.
  
     (1997-01-29)
  

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