Unified Extensible Firmware Interface
/ˌjuːˈfiːˈaɪ/
noun — "modern firmware interface replacing legacy BIOS."
UEFI, short for Unified Extensible Firmware Interface, is a modern firmware interface for computers that replaces the legacy BIOS. It provides a flexible and extensible environment for bootstrapping operating systems, initializing hardware, and enabling advanced system features. UEFI standardizes the interaction between system firmware and the operating system, supporting large disks, secure boot, and modular firmware components.
Basic Input/Output System
/ˌbaɪˈɒs/
noun — "firmware that initializes and tests hardware at startup."
BIOS, short for Basic Input/Output System, is firmware embedded on a computer’s motherboard that provides the fundamental instructions to initialize hardware components, perform self-tests, and load an operating system from storage. It acts as the bridge between the computer hardware and higher-level software, ensuring that devices are recognized, configured, and accessible before handing control to the operating system.