[?]: Difference between MMC, MC, Flash, EEPROM, PROM

[Arthurious]

Hi,
Please share your info on following terms .........or to be more precise difference between MMC, MC, Flash, EEPROM, PROM.........!!!

Thanks n Regards,

[CoMod]

PROM - programmable read-only memory for S5
ultraviolet erased
http://en.wikipedia.org/wiki/Programmab ... nly_memory

MMC, MC, EEPROM is memory card that can be electrically erased and reprogrammed.
EEPROM - Electrically Erasable Programmable Read-Only Memory.
Flash (Intel Trade Mark) is a specific type of EEPROM.
http://en.wikipedia.org/wiki/Flash_memory

Simatic MMC is a specific type of MultiMediaCard for new S7-300/1200 Simatic PLC only (Small size 32 × 24 × 1.5 mm).
http://en.wikipedia.org/wiki/MultiMediaCard

MC - is a specific type of PCMCIA Memory Card for old S7-300/400 Simatic PLC only (Big size 85.6 × 54 × 3.3 mm).
http://en.wikipedia.org/wiki/Memory_card