What is firmware?

Firmware, which is the program writing to EROM (erasable and read-only memory) or EEPROM ( erasable or programmed in read-only memory). Firmware refers to the device 'driver' stored inside the device. Through the firmware, the operating system can implement the operation of a specific machine in accordance with the standard device driver. For example, optical drives and burners have internal firmware. Firmware is the software that serves as the most basic level of a system.