from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Computer Science Memory hardware that allows fast access to permanently stored data but prevents addition to or modification of the data.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • read-only memory.
  • A software image of read-only memory (as of a game cartridge) used in emulation.
  • Range of Motion.
  • Return on Margin.
  • Rough order of magnitude. An informal cost or price estimate provided for planning and budgeting purposes only, typically expected to be only 75% accurate.


r(ead-)o(nly) m(emory).
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • Royal Ontario Museum

    September 13, 2015

  • ROM is the computer term for Read Only Memory. ROM is very useful in electronic systems when the power goes off! Anything stored in ROM (programs or data) will be available when power is restored.

    June 12, 2009