#memory_device__storage_device__storagedevice  a device that preserves information for retrieval
  supertype:  device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  acoustic_storage  a storage device consisting of acoustic delay lines
  subtype:  auxiliary_storage__auxiliarystorage__external_storage__secondary_storage__secondarystorage  a data storage device that is not the main memory of a computer
  subtype:  buffer_storage__buffer__buffer_store  (computer science) a part of RAM used for temporary storage of data that is waiting to be sent to a device; used to compensate for differences in the rate of flow of data between components of a computer system
     subtype:  memory_cache__cache  (computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated; used to optimize data transfers between system elements with different characteristics
        subtype:  disk_cache  a cache that stores copies of frequently used disk sectors in random access memory (RAM) so they can be read without accessing the slower disk
     subtype:  frame_buffer__framebuffer  (in computer graphics) a buffer that stores the contents of an image pixel by pixel
     subtype:  keyboard_buffer  a buffer that keeps track of key strokes until the computer is ready to respond to them
     subtype:  print_buffer__printbuffer  a buffer that stores data until the printer is ready
  subtype:  magnetic_disk__magnetic_disc__disk__disc  (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
     subtype:  diskette__floppy__floppy_disk  a small plastic magnetic disk enclosed in a stiff envelope with a radial slit; used to store data or programs for a microcomputer; "floppy disks are noted for their relatively slow speed and small capacity and low price"
     subtype:  hard_disc__hard_disk__fixed_disk__fixeddisk  a rigid magnetic disk mounted permanently in a drive unit
        subtype:  removable_disk__removabledisk  a hard disk that can be removed from the disk drive; removal prevents unauthorized use
  subtype:  magnetic_tape__mag_tape__magtape  memory device consisting of a long thin plastic strip coated with iron oxide; used to record audio or video signals or to store computer information; "he took along a dozen tapes to record the interview"
     subtype:  audiotape  magnetic tape for use in recording sound
     subtype:  cassette_tape  a cassette that contains magnetic tape
     subtype:  videotape  a relatively wide magnetic tape for use in recording visual images and associated sound
  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:  push-down_storage__push-down_store__pushdownstore__stack  a storage device that handles data so that the next item to be retrieved is the item most recently stored (LIFO)
  subtype:  recording.memory_device  a storage device on which information (sounds or images) have been recorded
     subtype:  compact_disk__compactdisk__compact_disc__compactdisc__CD  a recording that is smaller than a phonograph record; played back by a laser
        subtype:  audio_CD__audio_compact_disc__audiocompactdisc  compact discs used to reproduce sound (voice and music)
        subtype:  CD-R__compact_disc_recordable__CD-WO__compact_disc_write-once  a compact disc on which you can write only once and thereafter is read-only memory
        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:  sound_recording__audio_recording  a recording of just the sound
        subtype:  audiotape.tape_recording  a tape recording of sound
           subtype:  digital_audiotape__digitalaudiotape__DAT  an audiotape recording of sound
        subtype:  phonograph_record__phonograph_recording__record__disk__disc__platter  sound recording consisting of a disc with continuous grooves; formerly used to reproduce music by rotating while a phonograph needle tracked in the grooves
           subtype:  LP__L-P  a long-playing phonograph record; designed to be played at 33.3 rpm
        subtype:  soundtrack  sound recording on a narrow strip of a motion picture film
           subtype:  dubbing  a new soundtrack that is added to a film
        subtype:  talking_book__talkingbook  sound recording of someone reading a book; frequently used by blind people
     subtype:  tape_recording__tape__taping  a recording made on magnetic tape; "the several recordings were combined on a master tape"
        subtype:  audiotape.tape_recording  a tape recording of sound
        subtype:  videotape.tape_recording  a video recording made on magnetic tape
     subtype:  transcription  a recording (e.g., from broadcast to tape recording)
     subtype:  video_recording  a recording of both the video and audio components
        subtype:  videotape.tape_recording  a video recording made on magnetic tape
  subtype:  register.memory_device  (computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind
     subtype:  accumulator_register__accumulatorregister__accumulator  (computer science) a register that has a built-in adder that adds an input number to the contents of the accumulator
     subtype:  counter.register  (computer science) a register whose contents go through a regular series of states (usually states indicating consecutive integers)
     subtype:  index_register__indexregister  (computer science) a register used to determine the address of an operand
     subtype:  shift_register__shiftregister  (computer science) register in which all bits can be shifted one or more positions to the left or to the right

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