<acronym>

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.

(01 Mar 1997)

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Origin: Sw. As ridge, chain of hills, pl. Asar.

<geology> One of the ridges of sand or gravel found in Sweden, etc, supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See Eschar.

(01 Mar 1998)

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