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}

[glossary]
[Reference(s) to this entry by made by: {daemon}{flag day}{Multics}{rc file}{timesharing}{troff}]