| Acronym | Meaning |
| S/SYS | Subsystem |
| MMLS | Model-Modes-Loads-Stresses |
| PMOM | Performance Management Operations Manual |
| NSS | Nitrogen Supply Subsystem |
| IPS | Interface Problem Sheets |
| ESA | European Space Agency |
| QUIC | Quality Data Information And Control |
| DB | Dry Bulb |
| ETM | ElaPsed Time Meter |
| VGX | Velocity To Be Gained (Body X-Axis) |