| Acronym | Meaning |
| STIL | Software Test And Integration Laboratory |
| LVLH | Local Vertical/Local Horizontal |
| BTMS | Body Temperature Measuring System |
| BRCS | Basic Reference Coordinate System |
| N2 | Nitrogen |
| ESA | Engineering SuPPly Area |
| SAA | South Atlantic Anomaly |
| HV | Hydrogen Vent |
| E | LACS Extended Life Attitude Control System |
| HGA | High Gain Antenna |