| Acronym | Meaning |
| OD | Operations Directive |
| EGRS | Egress |
| TSRA | Total System Requirements Analysis |
| OMSP | Operational Maintenance Support Plan |
| ESA | Explosive Safe Area (KSC) |
| PID | Program Information Document |
| FCA | Functional ComPatibility Analysis |
| RFO | Request For Order |
| SSO | Subsystem Operation (in Spacelab) |
| F/D | Fill/Drain |