Abstract: A pen or stylus for use with a touch screen computer. The stylus has a conductive body and a conductive tip. A relay in the stylus is used to selectively electrically connect the conductive stylus body, which is coupled to the hand of the, user, to the conductive tip. A series of the pulses are produced by the stylus that are detected by software on the computer. The detected pulses can be used to differentiate between a finger touch and a stylus touch and to transfer data or commands from the stylus to the touch screen device.