![]() a consistent way for application programs and operating systems to interact with the keyboard, display, and other input/output devices. The BIOS additionally provides abstraction layer for the hardware, i.e. The fundamental purposes of the BIOS are to initialize and test the system hardware components, and to load a bootloader or an operating system from a mass memory device. The BIOS software is built into the PC, and is the first software run by a PC when powered on. The name originated from the Basic Input/Output System used in the CP/M operating system in 1975. In IBM PC compatible computers, the Basic Input/Output System ( BIOS), also known as System BIOS, ROM BIOS or PC BIOS ( Template:IPAc-en), is a de facto standard defining a firmware interface.
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