| Acronym | Meaning |
 | NBS | National Bureau Of Standards |
| NACA | National Advisory Committee On Aeronautics |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| OMDP | Orbiter Maintenance Down Period |
| LRB | Liquid Rocket Booster |
| SNU | Solar Neutrino Units |
| AAO | Anglo-Australian Observatory |
| EUTELSAT | European Telecommunications Satellite Organization |
| JEM | Japanese Experiment Module |
| OCST | Office Of Commercial Space Transportation |
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