OS
1. operating system.
2. [obsolete, ITS], an output spy. See "OS and JEDGAR".
3. <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.
[Jargon File]
(1997-09-22)
Nearby terms:
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