Basic Input/Output System (BIOS)

The Basic Input/Output System (BIOS) is firmware stored on a computer's motherboard that initializes hardware components when the computer is powered on. It performs essential startup tasks, such as testing memory, detecting connected devices, and preparing the system to load the operating system (like Windows or macOS). Essentially, BIOS acts as a bridge between the hardware and software, ensuring all parts are ready for use before the main operating system takes control. It also allows users to configure hardware settings through a setup interface.