What is a BIOS?

A BIOS, short for Basic Input/Output System, is a firmware that initializes a computer's hardware components and enables communication between the hardware and software. It is a vital component of a computer system, typically stored on a chip on the motherboard. When a computer is powered on, the BIOS performs a Power-On Self Test (POST), verifying the hardware's functionality. It then locates the operating system and loads it into the computer's memory. The BIOS also manages system settings such as boot order, date/time, and hardware configurations. It facilitates the interaction between the computer's software and hardware, ensuring compatibility and enabling the operating system to operate efficiently. Overall, the BIOS acts as a bridge between the hardware and software, ensuring a smooth startup process and facilitating the functioning of a computer system.