Abstract: The present invention provides a coupling mechanism between a primary computing device and a secondary computing device, wherein each computing device may be physically separated from each other while continuing to communicate with each other. The primary computing device has the minimum functionality of a complete computing system such as a Tablet PC™, for example, and the secondary computing device has the minimum functionality of a hand-held computer monitor. The secondary computing device may also however, have the functionality of a complete computing system, or other level of functionality therebetween. The primary computing device may act as a master and control the functionality of the secondary computing device via a network or data bus connection, for example. The secondary computing device may be toggled between computer monitor functionality and secondary computer functionality regardless of whether or not the two computers are physically connected.