#computer_hardware__hardware  the mechanical, magnetic, electronic, and electrical components making up a computer system
  exclusion:  #software
  supertype:  pm#hardware (pm)  #component
  part of:  #electronic_computer
  subtype:  #CPU__central_processing_unit__C.P.U.__central_processor__centralprocessor__processor__mainframe  (computer science) the part of a computer (a microprocessor chip) that does most of the data processing; the CPU and the memory form the central part of a computer to which the peripherals are attached
  subtype:  #memory_board__memory__storage__store  an electronic memory device; "a memory and the CPU form the central part of a computer to which peripherals are attached"
     subtype:  #RAM__random-access_memory__random_access_memory__random_memory__read/write_memory  the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible
     subtype:  #ROM__read-only_memory__read-only_storage__fixed_storage__fixedstorage  (computer science) memory whose contents can be accessed and read but cannot be changed
        subtype:  #CD-ROM__compact_disc_read-only_memory  a compact disk that is used with a computer (rather than with an audio system); a large amount of digital information can be stored and accessed but it cannot be altered by the user
        subtype:  #EPROM__erasable_programmable_read-only_memory  (computer science) a read-only memory chip that can be erased by ultraviolet light and programmed again with new data
     subtype:  #real_storage  the main memory in a virtual memory system
     subtype:  #scratchpad  (computer) a high-speed internal memory used for temporary storage of preliminary information
     subtype:  #virtual_memory__virtualmemory__virtual_storage__virtualstorage  (computer science) memory created by using the hard disk to simulate additional random-access memory; the addressable storage space available to the user of a computer system in which virtual addresses are mapped into real addresses
  subtype:  #scheduler  computer hardware that arranges jobs to be done by the computer in an appropriate order
  subtype:  #sequencer  computer hardware that sorts data or programs into a predetermined sequence

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