The Manned Maneuvering Unit (MMU) was flown on three Shuttle flights during 1984 and demonstrated just some of its many capabilities. In addition to the satellite rendezvous, docking, and stabilization techniques already verified, the MMU has the capability to rescue disabled crewmembers, assist with satellite servicing and refueling, perform inspections and photography, and assist with on-orbit construction. Many of these capabilities have applications in both the Shuttle and Space Station eras. Various augmentations to the MMU are being considered and developed for these future applications. Enhancements discussed in this paper include a digital electronics assembly, navigation aid, and a propellant tank kit.