#digital_computer__digitalcomputer  a computer that represents information by numerical (binary) digits
  supertype:  #electronic_computer__computer__computing_machine__computingmachine__computing_device__computingdevice__data_processor__information_processing_system  a machine for performing calculations automatically
  subtype:  #bulletin_board_system__bulletin_board__electronic_bulletin_board__bbs__bb  (computer science) a computer that is running software that allows users to leave messages and access information of general interest
  subtype:  #file_server  (computer science) a digital computer that provides workstations on a network with controlled access to shared resources
     subtype:  #dedicated_file_server  (computer science) a file server that can be used only as a file server
     subtype:  #non-dedicated_file_server  (computer science) a file server that can be used simultaneously as a workstation
  subtype:  #mainframe_computer__mainframecomputer__mainframe  a large digital computer serving 100-400 users and occupying a special air-conditioned room
  subtype:  #minicomputer  a digital computer of medium size
  subtype:  #multiprocessor  a computer that uses two or more processing units under integrated control
  subtype:  #personal_computer__PC__microcomputer  a small digital computer based on a microprocessor and designed to be used by one person at a time
     subtype:  #desktop_computer__desktopcomputer  a personal computer small enough to fit conveniently in an individual workspace
     subtype:  #portable_computer  a personal computer that can easily be carried by hand
        subtype:  #briefcase_computer__briefcasecomputer  a portable computer housed in a box that resembles a briefcase
        subtype:  #hand-held_computer  a portable computer small enough to be carried in your pocket
        subtype:  #laptop_computer__laptop  a portable computer small enough to use in your lap
        subtype:  #notebook_computer__notebook  a small compact portable computer
  subtype:  #von_Neumann_machine  any digital computer incorporating the ideas of stored programs and serial counters that were proposed in 1946 by von Neumann and his colleagues
  subtype:  #workstation  a desktop digital computer that is conventionally considered to be more powerful than a microcomputer

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