BIOS, which stands for Basic Input Output System, is software that is stored on a small memory chip on the motherboard. It is BIOS that is responsible for the POST and therefore the very first software that is executed when a computer is started.
What is BIOS? | Explained
The BIOS firmware is non-volatile. This means that settings are saved and can be restored even after the device is disconnected from power.
The BIOS instructs the computer on how to perform basic functions, such as booting and keyboard operations.
BIOS is also used to identify and configure the hardware in a computer, such as the hard drive, floppy drive, optical drive, CPU, memory, and related devices.
