| Acronym | Meaning |
| RDGT | Reliability Development Growth Test |
| ECN | Engineering Change Notice |
| BEL CRK | Bell Crank |
| CCMTC | Command And Control Maint Team Complex |
| IMC | Instrument Meteorological Conditions |
| SYST | System |
| FIM | Framework Information Model |
| CTRL | Control |
| PTTI | Precise Time And Time Interval Dissemination And Distribution |
| CMI | Computer Managed Instruction |