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The BIOS (basic input/output system) of an IBM-compatible PC is a ROM which performs the POST (power-on self-test), initializes the peripheral devices, and provides a basic firmware interface.

The BIOS (basic input/output system) of an IBM-compatible PC is a ROM which performs the POST (power-on self-test), initializes the peripheral devices, and provides a basic firmware interface.

Unified Extensible Firmware Interface (UEFI) was designed as a successor to BIOS, aiming to address its technical shortcomings. As of 2014, new PC hardware predominantly ships with UEFI firmware.

See also

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