| Acronym | Meaning |
| DDIS | Data Depository Index System |
| LCU | Inertial Components Temperature Controller |
| S/8 | Standby |
| OTA | Optical Telescope Assembly |
| QSMVT | Quarter Scale Model Vibration Testing |
| SIPS | Small Instrument Pointing System |
| EXCH | Exchange |
| EMT | Electro-Mechanical Test |
| MPM | Manipulator Positioning Mechanism |
| CC | Channel Controller |