BIOS, in full Basic Input/Output System, computer program that is typically stored in EPROM and used by the CPU to perform start-up procedures when the computer is turned on. Its two major procedures are determining what peripheral devices (keyboard, mouse, disk drives, printers, video cards, etc.)

What do you want to know about BIOS and post?

BIOS, which stands for Basic Input Output System, is software stored on a small memory chip on the motherboard. It’s BIOS that’s responsible for the POST and therefore makes it the very first software to run when a computer is started.

What is the main purpose of the BIOS?

BIOS enables computers to perform certain operations as soon as they are turned on. The principal job of a computer’s BIOS is to govern the early stages of the startup process, ensuring that the operating system is correctly loaded into memory.