| Acronym | Meaning |
| CY | Cycle |
| EPG | Electrical Power Generator |
| QSMVT | Quarter Scale Model Vibration Testing |
| SCM | Site Configuration Message |
| PSE | Payload Service Equipment |
| EOM | End Of Mission |
| DOE | Department Of Energy |
| AAFE | Aeroassist Flight Experiment |
| SRU | Space Replaceable Units |
| FCOS | Flight Computer Operating System |