A computing system includes a computing device and an image composing unit for generating a common video signal for a display device. The computing device is adapted to partition a display area of the display device into a plurality of sections. One of the sections is related to another computing device. The computing device is further adapted to receive an input signal from an input device. The input signal is relatable to a position within the display area. The computing device is further adapted to provide the other computing device with the input signal depending on the position being in one of the sections related to the other computing device.