astronaut propulsion unit
device used for untethered spacewalk
Astronaut Maneuvering Unit
device intended for untethered spacewalks during Project Gemini
Manned Maneuvering Unit
device used for untethered spacewalks during the Space Shuttle program
Marquardt Space Sled
proposed device intended for use on untethered spacewalks
Simplified Aid for EVA Rescue
device used for untethered spacewalks during the Space Shuttle and ISS programs
Hand-Held Maneuvering Unit
device used for untethered spacewalk during Project Gemini and Skylab