Read-Only Memory

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read-only memory

[′rēd ¦ōn·lē ′mem·rē]
(computer science)
A device for storing data in permanent, or nonerasable, form; usually a static electronic or magnetic device allowing extremely rapid access to data. Abbreviated ROM. Also known as read-only storage.

Read-Only Memory

(ROM) A type of data storage device which is manufactured with fixed contents. In its most general sense, the term might be used for any storage system whose contents cannot be altered, such as a gramophone record or a printed book; however, the term is most often applied to semiconductor integrated circuit memories, of which there are several types, and CD-ROM.

ROM is inherently non-volatile storage - it retains its contents even when the power is switched off, in contrast to RAM.

ROM is often used to hold programs for embedded systems since these usually have a fixed purpose. ROM is also used for storage of the lowest level bootstrap software (firmware) in a computer.

See also Programmable Read-Only Memory.
References in periodicals archive ?
The Park is home to most of Taiwan`s producers of wafers, integrated circuit foundries, mask read-only memory, ADSL modems, Web cards, and small thin-film liquid-crystal displays.
The new V850E/MA3 microcontroller, the highest-performing device with embedded large flash and mask read-only memory (ROM) in NEC Electronics' popular 32-bit V850 microcontroller family, operates at 80 megahertz (MHz) and executes 106 Dhrystone1.
National Laboratory have developed an information storage method they call "high-density read-only memory," or HD-ROM.