(moBo) The main printed circuit Board in an electronic device, particularly a computer, which may contain sockets that accept additional Boards ("daughter-Boards"). In a personal computer, the motherBoard contains the Bus, the microprocessor, and integrated circuits used for controlling any Built-in peripherals such as the keyBoard, text and graphics display, serial ports and {parallel ports}, {joystick}, and {mouse} {interfaces}. (2000-08-10)