Abstract: Provided are computing devices that use a module and can exhibit different interfaces. In one embodiment provided is a mobile computing device comprising: a body in shape of a module having two parallel flat surfaces; a processor and a memory placed inside the body; and a docking port at end of the body between the parallel flat surfaces for detachably attaching to a monitor to obtain an electronic connection wherein the computing device is attached to the monitor by resting on one of the flat surfaces to provide one or more of a cellular phone, a laptop computer, a personal computer, a tablet computer, or a watch.