| Acronym | Meaning |
| GCN | Gamma-ray Burst Coordination Network |
| ASD(C3I) | (U.S.) (Command |
| AOU | American Ornithologists' Union |
| EXREP | Expeditious Repair (SM&R Code) |
| AESR | Aeronautical Equipment Service Record |
| COP | Colombian Peso (ISO 4217 Currency Code) -Common Operating/Operational Picture |
| CD | Cadmium |
| WRAC | Women's Royal Army Corps (WWII UK) |
| BRA | Brazil (ISO 3166 Trigram) |
| DFAD | Digital Feature Analysis Data (dee-fad) |