| 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 |