불휘발성 메모리 는 ROM ( Read Only Memory ) , PROM ( Programmable ROM ) , EPROM ( Electrically Programmable ROM ) , EEPROM ( Electrically Erasable and Programmable ROM ) , 플래시 메모리 , PRAM ( Phase - change RAM ) , MRAM ( Magnetic RAM ) , RRAM ( Resistive RAM ) , FRAM ( Ferroelectric RAM ) 등 을 포함 한다 .