PROM PROM: Programmable Read Only Memory, programmable memory chip; by exchanging a PROM, operating system functions of devices - e.g. B. Country code settings in DVD-Change players. Similar entries 100 V technology 1080 1080p 16:9 switching 200 Hz technology 24p 3/2 pull down AAC AACS tap acuity Adobe YCC601 BEA AFC AGC