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1 definition found
 for ''operating system''
From The Jargon File (version 4.4.7, 29 Dec 2003) :

  operating system
      [techspeak] (Often abbreviated ?OS?) The foundation software of a machine;
      that which schedules tasks, allocates storage, and presents a default
      interface to the user between applications. The facilities an operating
      system provides and its general design philosophy exert an extremely strong
      influence on programming style and on the technical cultures that grow up
      around its host machines. Hacker folklore has been shaped primarily by the
      Unix,+ITS,+TOPS-10,+TOPS-20/{TWENEX">Unix, ITS, TOPS-10, TOPS-20/{TWENEX, WAITS, CP/M, MS-DOS,
      and Multics operating systems (most importantly by ITS and Unix). See
      also timesharing.

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