3. There are three types of ROM.
PROM
EPROM
EEPROM
4. PROM stand for (programmable read only
memory).
PROM are manufactured.
Data can written.
A special device programmer.
5. EPROM stand for (Erasable read only memory)
A rewritable memory chip.
It is content without power.
External programming device.
Placed on the mother board.
6. EEPROM stand for (Electronically Erasable
programmable Read Only Memory).
A rewritable memory chip.
Typically used on circuit board.
Store small amount of instruction and data.