Stands for "Read-Only Memory." Please do not confuse this term with RAM or a hard drive, as many people already do. ROM is memory containing hardwired instructions that the computer uses when it boots up, before the system software loads. In PCs, the instructions are read from a small program in the ROM, called the BIOS (Basic Input/Output System).
This page contains a technical definition of ROM. It explains in computing terminology what ROM means and is one of many hardware terms in the TechTerms dictionary.
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