| Acronym | Meaning |
 | CRRES | Combined Release/Radiation Effects Satellite |
| ACR | Active Cavity Radiometer |
| APL | Applied Physics Laboratory (at Johns Hopkins) |
| UFO | Unidentified Flying Object |
| CXBR | Cosmic X-ray Background Radiation |
| SARA | Satellite Pour Astronomie Radio Amateur |
| MMU | Manned Maneuvering Unit |
| TSPK | Tsentr Podgotovka Kosmonavti |
| PI | Principal Investigator |
| AOA | Abort Once Around (shuttle Abort Plan) |
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