The BIOS is a piece of low-level software that is in charge of initializing the computer's hardware and giving the operating system basic instructions to load. The Basic Input and Output System is referred to as BIOS. It is in charge of essential tasks like initializing the operating system, checking the time on the internal clock, and recognizing installed hardware. The BIOS is the first piece of software that runs when the computer is turned on, so without it, it wouldn't be able to boot properly.