An auxiliary isometric computer pointing device for attachment to a P/S-2 mouse port connector along the right-hand side of the IBM ThinkPad laptop computer includes a TrackPoint IV pointing assembly, a mating electrical connector, a manually operated momentary switch, all enclosed in a compact, self-aligning enclosure. When provided with a suitable mouse driver, the laptop computer equipped with the auxiliary pointing device permits 3-D manipulation and alternative scrolling operations, independent of normal cursor positioning. The auxiliary pointing device derives operating power via the P/S-2 connector and provides a standard mouse output signal.