Abstract: A computing device for a vehicle comprising: a display screen; a central processing unit configured to run an operating system and at least one application operable to output an internal video signal adapted to be displayed on the display screen; a camera interface configured to receive a video input from one or more external cameras and to output corresponding external video signals for display on the display screen; a multiplexing unit configured for receiving the internal video signal and the one or more external video signals, the multiplexing unit comprising a display output coupled to the display screen and being configured for selectively forwarding one of the internal video signal and the one or more external video signals on the display output towards the display screen; and a controller unit configured for controlling the selective forwarding of the multiplexing unit based on controller input received by the controller unit.