What does BIOS stand for?

The correct answer is Basic Input Output System. BIOS is firmware that gets the computer started during the booting process and provides a runtime environment for the operating system and the programs. It initializes and tests the system hardware components and loads the operating system from the hard drive or other storage devices.

Each word in the acronym underlines the core functions of BIOS: "Basic" signifies its fundamental nature and that it provides essential instructions for the hardware; "Input" and "Output" refer to its role in managing data transfer between the computer's hardware and the operating system, facilitating communication and control. By understanding what BIOS stands for, one can better appreciate its fundamental purpose in computer operation.