storage (PROM) A kind of ROM which can be written using a

PROM programmer. The contents of each bit is determined by a

fuse or antifuse. The memory can be programmed once after

manufacturing by "blowing" the fuses, which is an irreversible

process. Blowing a fuse opens a connection while blowing an

antifuse closes a connection (hence the name). Programming is

done by applying high-voltage pulses which are not encountered

during normal operation.