OS
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Os
(chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
OS
(1)OS
(2)[obsolete, ITS], an output spy. See "OS and JEDGAR".
OS
(operating system)An operating system from IBM for
their System/360 line of hardware announced in 1964. OS was
planned with several flavours that were supposed to be
compatible. OS was late, memory hungry and not able to reach
the marketing objectives of IBM for the 360/30, the planned
successor of the IBM 1401. IBM then decided to design a new
operating system for the low end machines which they called
DOS/360.
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