PROM, EP-ROM, & EEPROM are the examples of-

Answer is ROM. 
PROM : it is a programmable read only memorychip on which data canbe written only once.Once a program has been written onto a PROM ,it remains there forever.
EEPROM : it is a electrically erasable programmable read only memory. EEPROM is a special type of PROM that can be erased by exposing it to an electrical charge.
EPROM: It is a erasable programmable read only memory that can be erased by exposing it to a ultaviolent light.Once it is erased ,it can be reporogrammed .