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Programmable read-only memory (PROM)
A PROM chip that does not have its contents “burned in” at the factory as is done with standard ROM chips. Instead, special functionality is installed that allows the end user to burn in the contents of the chip.
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A storage system that uses electric voltages delivered to the pins of the chip to force erasure. EEPROMs can be erased without removal from the computer, giving them much greater flexibility than standard PROM and EPROM chips.
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A PROM chip that has a small window through which the illumination of a special ultraviolet light causes the contents of the chip to be erased. After this process is complete, the end user can burn new information into the EPROM.
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Program recorded in permanent or semipermanent computer memory. Software or computer instructions that have been permanently encoded into the circuits of semiconductor chips. Software that is stored in a ROM chip.
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Physical keying material, such as printed key lists, punched or printed key tapes, or programmable, readonly memories (PROM).
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A term used to describe software that is stored in a ROM chip. Also called firmware.
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