| Acronym | Meaning |
| TC | Time To Circular |
| BCFS | Backup Flight Control System |
| IOCU | Input/Output Control Unit |
| EVO | Engineering Verification Order |
| ELDV | Electrically Operated Depressurization Valve |
| PGSE | Payload Ground Support Equipment |
| LOS | Indian Ocean Ship (STDN) |
| LSF | Laboratory Simulation Facility |
| GM | Gaseous Mixture |
| SR&Q | Safety |