The program group which controls disk drive,the keyboard and the peripheral device of the video card and the like which are connected to the computer. Like this it is called from the fact that the basic input/output expedient for thesee quipment is offered vis-a-vis OS and the application software.Inthe personal computerwe are recordedby non- volatilization memorysuch asthe flash memory whichis installed onthe motherboard, it has become possible to renew to up-to-date contents.
