The main board of a computer, generally containing the circuitry when it comes to main processing device, keyboard, and monitor and frequently having slots for accepting additional circuitry.
the main circuit board of an individual computer system, containing the circuitry when it comes to central processing product, keyboard, mouse and monitor, together with slots for any other devices
The board containing the key circuits of an electric device, specifically computers. The word is used mainly in microcomputer literature, where it designates the board containing the main development coach, and often in addition the cpu. On motherboards fashioned with an expansion coach, frequently all of the circuits perhaps not contained on an expansion card are on the motherboard.