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Operating System
  • An integrated collection of service routines for supervising the sequencing and processing of programs by a computer. Operating systems control the allocation of resources to users and their programs and play a central role in operating a computer system. Operating systems may perform input or output, accounting, resource allocation, storage assignment tasks, and other system related functions. Synonymous with Monitor, Executive Control Program and Supervisor. (DODD 5200. 28M;)