BIOS

詳細解釋：

BIOS

n.（名詞）
The set of routines stored in read-only memory that enable a computer to start the operating system and to communicate with the various devices in the system, such as disk drives, keyboard, monitor, printer, and communications ports.
基本輸入輸出系統：貯存於唯讀存儲器中的一套例程，能令計算機啟動作業系統以及連線系統內各種設備（如磁碟驅動器、鍵盤、顯示器、印表機和通訊連線埠）

來源：
b(asic) i(nput/)o(utput) s(ystem)
b(asic) i(nput/)o(utput) s(ystem)