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operating system noun

  /ˈɑpəˌɹeɪtɪŋ ˌsɪstəm/ , /ˈɒpəˌɹeɪtɪŋ ˌsɪstəm/
  • (computing, software) Software that is designed for controlling the allocation and the use of various hardware resources to tasks and remote terminals.
 systema operationis, systema internum
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