| Abbreviation | Definition |
|---|---|
| FDDB | Function Designator Data Base |
| FDE | Failure Detection Electronics |
| FDE | Flight Dynamics Engineers |
| FDE | Fluid Dynamics Experiment |
| FDF | Flight Data File |
| FDF | Flight Dynamics Facility |
| FDI | Failure Detector Indicator |
| FDI | Fault Detection and Isolation |
| FDIE | Fault Detection, Isolation, and Estimation |
| FDIIR | Fault Detection, Isolation, Identification, and Recompensation |
| FDIR | Fault Detection, Isolation, and Recovery |
| FDL | Flight Director Loop |
| FDLN | FeeDLiNe |
| FDM | Flight Data Manager |
| FDM | Frequency Data Multiplexer |
| FDMDA | Full Diameter Motorized Door Assembly |
| FDO | Fee Determination Official |
| FDO | Flight Dynamics Officer |
| FDOR | Flight Design Operations Review |
| FDPS | Flight Data Processing System |