Source : Free On-Line Dictionary of Computing

Flash Erasable Programmable Read-Only Memory
     
         (FEPROM, "flash memory") A kind of {non-volatile
        storage} device similar to {EEPROM}, but where erasing can
        only be done in blocks or the entire chip.
     
        In 1995 this relatively new technology started to replace
        {EPROM}s because reprogramming could be done with the chip
        installed.  At that time FEPROMs could be rewritten about 1000
        times.
     
        Like {EAPROM} and ferro-magnetic material, FEPROMs rely on {FN
        tunnelling}.  Some flash memory supports block erase.
     
        (1995-04-22)