| Acronym | Meaning |
 | FRED | Space Station Freedom |
| FEM | Flight-Engineering Model |
| GRS | Gamma Ray Spectrometer |
| HD | Henry Draper Catalog Entry |
| TAU | Thousand Astronomical Unit |
| ACTS | Advanced Communications Technology Satellite |
| SDSS | Sloan Digital Sky Survey |
| GMS | Geostationary Meterological Satellite |
| CRIM | Commercial Refrigerator Incubator Module |
| ESTEC | European Space Research And Technology Centre |
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