| Acronym | Meaning |
 | MMU | Manned Maneuvering Unit |
| HEAO | High Energy Astronomical Observatory |
| NTT | New Technology Telescope |
| AOCS | Attitude And Orbit Control System |
| SPAS | Space Pallet Satellite |
| WUPPE | Wisconsin Ultraviolet PhotoPolarimter Experiment |
| TWTA | Travelling Wave Tube Amplifier |
| LEO | Low Earth Orbit |
| ALAE | Atmospheric Lyman-Alpha Emissions |
| ASA | Astronomical Society Of The Atlantic |
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