BIOS (basic input/output system) is the program a computer’s microprocessor uses to start the computer system after it is powered on. It also manages data flow between the computer’s operating system (OS) and attached devices, such as the hard disk, video adapter, keyboard, mouse and printer.
Basic Definition:It is a program used by the processor of the computer to get the system started once it is turned on. Why BIOS is used ?? The main function of the BIOS is to manage the data flow between computer s operating system and attached devices like hard disk,keyboard,mouse and etc. It is a type of firmware used by the processor during the booting process.
