Abstract: A monitor and a slide-in PC tray are operatively disposed in a common housing in an all-in-one type personal computer. User operable control buttons are mounted on the front side wall of the housing, and the PC tray forwardly slides into the housing, toward the rear ends of the control buttons, through an opening in the rear side wall of the housing. A circuit board is supported within the housing inwardly adjacent the front wall, with depressible switches mounted on the unit being in an aligned, facing relationship with the inner ends of the control buttons. As the PC tray is slid forwardly into the housing, cooperating alignment structures on the tray and the housing facilitate the automatic mating of a pair of facing electrical connectors on the tray and the rear side of the circuit board to thereby electrically couple the switches to the electronic apparatus on the PC tray. Each control button, when pressed, activates its facing circuit board switch and thus the related circuitry on the PC tray.