| Acronym | Meaning |
| TP | Transition Period (T.P. Preferred) |
| BFCS | Backup Flight Control System |
| FCF | First Captive Flight |
| DCR | Design Concern Report |
| REM | Roentgen Equivalent In Man |
| M&R | Maintenance And Refurbishment |
| MTBR | Mean Time Between Replacement |
| GAC | Grumman Aerospace Corporation |
| SDD | System Design Document |
| NOCC | Network Operations Control Center (GSFC) |