| Acronym | Meaning |
 | S/EOS | Standard Earth Observation Satellite |
| OMSF | Office Of Manned Space Flight (now OSTS) |
| TDRSS | Tracking And Data Relay Satellite System |
| RM/MS&C | Redundancy Management/Moding |
| PRI | Primary |
| RFL | Reflect |
| FS | Federal Specification |
| RNG | RT Range Rate |
| FPS | Forward Power Supply |
| MAUS | Messenschafteliche Autonome Experiment Unter |
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