(A) Basic Input Output Structure
(B) Basic Input Operating System
(C) Basic Input Output System
(D) None of these
🧠 Explanation:
BIOS stands for **Basic Input Output System**. It is a firmware stored on a chip inside the computer that initializes and tests hardware components during the startup process. BIOS also provides a basic set of instructions for the computer to communicate with its hardware before the operating system loads. It plays a critical role in booting the computer and managing data flow between the operating system and attached devices.
