#operating_system__operatingsystem__OS  (computer science) software that controls the execution of computer programs and may provide various services
  supertype:  #software__software_system__software_package__package  (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory; "the market for software is expected to expand"
  part:  #supervisory_program
  part of:  #platform.computer_system
  subtype:  #DOS__disk_operating_system  an operating system that is on a disk
     subtype:  #MS-DOS__Microsoft_disk_operating_system  an operating system developed by Bill Gates for personal computers
  subtype:  #UNIX__UNIX_operating_system__UNIX_system  a powerful operating system developed at the Bell Telephone Laboratories

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