• EEPROM (Electrically Erasable Programmable Read-Only Memory) can be erased and reprogrammed repeatedly using electricity.
• Mask ROM (MROM) - A non-volatile memory chip with data permanently written during manufacturing, unalterable thereafter.
• PROM (Programmable Read-Only Memory) - A memory chip that can be programmed once after manufacturing; data becomes permanent and cannot be changed.
• EPROM (Erasable Programmable Read-Only Memory) - A memory chip that can be erased using ultraviolet light and reprogrammed multiple times.