BIOS is the abbreviation of "Basic Input Output System" in English. After literal translation, the Chinese name is "basic input output system". Its full name should be ROM－BIOS, which means read-only memory basic input and output system.

In fact, it is a set of programs solidified on a ROM chip on the motherboard in the computer, which stores the most important basic input and output programs of the computer, system setup information, self-check program at startup and bootstrapping program at system startup.