BIOS

BIOS is abbreviation of Basic input output system, Bios able to do :

1.Initialtation and to trial to hardware.
2.To accommodate and carry out operating system.
3.To manage some basic configuration in computer (like calendar, time, storage
media configuration, booting configuration, and computer stability).
4.To help operating system and aplication to manage process of hardware with
use BIOS Runtime Service.

BIOS available low level communication interface, and BIOS able to control alot kind of hardware like a keyboard, because nearness with hardware. Usually BIOS made by assembly.
`The term of BIOS first time come on in operating system CP/M, that from part of CP/M that accommodated in time booting process begin, that face secara langsung with hardware. Majority of DOS have a file that called "IBMBIO.com" (IBM PC-DOS) or "IO.SYS (MS-DOS), which have same function like CP/M disk BIOS.