A tablet computer is composed of a tablet component and a keyboard component. The tablet component houses all of the essential hardware of tablet computer including the central processing unit (CPU), the memory, the power supply, and a touch screen display. The keyboard component is a simple peripheral device that offers no computing functionality unless connected with the tablet component. The tablet component and keyboard component can mate to form a notebook-type computer. The tablet component and keyboard component can mate in an orientation allowing use of only a tablet computing user interface. The tablet component is removable from the keyboard component and functions independently as a tablet computing device. The keyboard component has a counterbalance armature to oppose the moment of inertia due to the changing center of mass of the tablet computer as the tablet component is moved from a closed to an open position.