ROM (Read-Only Memory) - definition

ROM is a non-volatile memory, which means it can store data permanently even without a power supply. It stores data using perspective binary code. In another word, it is said that ROM is PLD (Programmable Logic Device). Core information stored inside a ROM can’t be modified, it can only be read. It is mostly used in the computer system or mobile devices for start-up or boot options.

There are four (4) major types of ROMs are present which are:
1. MROM (Masked Read-Only Memory)
2. PROM (Programmable Read-Only Memory)
3. EPROM (Erasable programmable Read-Only Memory)
4. EEPROM (Electrically Erasable Programmable Read-Only Memory)