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Computing (FOLDOC) dictionary
Xerox Data Systems Model 940
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computer (SDS 940, XDS 940) A time-sharing system,
announced in February 1966, developed by Scientific DataSystems with help from The University of California atBerkeley 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.