Xerox Data Systems Model 940

from The Free On-line Dictionary of Computing (8 July 2008)

Xerox Data Systems Model 940
SDS 940
XDS 940

   <computer> (SDS 940, XDS 940) A {time-sharing} system,
   announced in February 1966, developed by {Scientific Data
   Systems} with help from The {University of California at
   Berkeley} and {Tymshare}.  SDS 940 was {backward compatible}
   with SDS's previous systems (except the 12-bit {SDS 92}).  It
   had {monitor} and user modes, dynamic program relocation,
   automatic memory fragmentation, and system protection.

   After 1968 {Xerox} bought out SDS and renamed the SDS machines
   "Xerox Data Systems" (XDS).  Xerox then produced the {XDS
   530}.

   (2004-06-17)