Read-Only+Memory+(ROM)

ROM - read-only memory, is [|computer memory] on which [|data] has been prerecorded. Once data has been written onto a ROM [|chip], it cannot be removed and can only be [|read]. Unlike [|RAM], ROM retains its contents even if the power supply is turned off. ROM is referred to as being nonvolatile, Most [|computers] contain a small amount of ROM that [|stores] [|programs] that are essential such as the bootstrap programs. Variations of a ROM is a [|PROM] (programmable read-only) and EEPROM (electrically erasable programmable). One small note is that ROM is random access like RAM, but not writeable.