| Abbreviation | Definition |
|---|---|
| FDM | Functional Data Manager |
| FDMA | Frequency Division Multiple Access |
| FDMIS | Force Development Management Information System |
| FDMIS-AS | Force Development Management Information System Authorization Subsystem |
| FDMP | Full Duplex Message Protocol |
| FDNAD | Field Derivative (Non-Additive Authorizations) Database |
| FDNB | Force de Defense Nationale du Burundi(Burundi National Defence Force) |
| FDO | Fire Direction Officer |
| FDO | Flexible Deterrent Option |
| FDO | Flexible Deterrent Options |
| FDO | Flight Deck Officer |
| FDO | Foreign Disclosure Officer |
| FDO | Fundamental Deterioration Overview |
| FDR | Flight Data Recorder |
| FDR | Future Data Radio |
| FDR | Future Digital Radio |
| FDR/FA | Flight Data Recorder/fault Analyzer |
| FDRP | First Destination Reporting Point |
| FDS | Fault Detection System |
| FDS | Fire Direction System |