Reviews the history, technology, and capabilities of remotely manned systems (RMS), which differ from other remote control devices by employing control in real time based on sensor information relayed from the remote operating device. The major elements of the RMS are sensors, displays, manipulators, and computers. The basic sensor is the TV camera. Some RMSs have other sensors directly related to the human apparatus (tactile, acoustic) or sensors that can detect such effects as nuclear radiation, gravitational acceleration, infrared radiation, and magnetic fields. With the RMS, man can safely perform tasks in hostile environments. Small RMSs can replace conventional manned aircraft in attacking heavily defended targets. Also, the RMS eliminates costly life-support systems that add bulk, weight, and complexity to manned systems. Current programs include a variety of systems to allow men to work by proxy under otherwise untenable extremes of pressure, temperature, radiation, physical loading, or enemy action. (Published in [Astronautics and Aeronautics], April 1972.) 18 pp. Ref.