abbreviation of Basic Input-Output System: a computer's basic firmware (= a set of programs that form part of a computer) that operates every time it starts up

Computers using Intel processors with an out-of-date BIOS refused to function when turned on. 使用带有过时输入输出系统的英特尔处理器的计算机在开机时拒绝工作。

I started the PC and hit the Delete key to go into the BIOS setup. 我启动了计算机并按下Delete 键进入了输入输出系统的设置。