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

(storage)
(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 chip data is recorded in read-only memory during the semiconductor production process, and therefore cannot be rewritten, thus guaranteeing its authenticity.
Other features include the ability to generate read-only memory code from the Web site, easy access to on-line technical support, and direct access to ZiLOG's distributors.
Today, Microchip offers more than 180 PIC devices in reprogrammable (Flash), one-time-programmable (OTP), and read-only memory (ROM) program memory configurations, featuring numerous on-chip peripherals.