| FDO | Facilities Development and Operations 
| Others |
| FDO | Factory Direct Ordering
| Others |
| FDO | Failed During Operation
| Others |
| FDO | Farmers Development Organization
| Others |
| FDO | Feature Data Objects
| Others |
| FDO | Fee Determination Official
| Others |
| FDO | Feedback Directed Optimization
| Others |
| FDO | File Data Object
| Others |
| FDO | Fire Direction Officer
| Others |
| FDO | Firm Dealer Order
| Others |
| FDO | First Day Outfit
| Others |
| FDO | First Dose Observation
| Others |
| FDO | Flexible Deterrence Options
| Others |
| FDO | Flexible Deterrent Option
| Others |
| FDO | Flexible Deterrent Options
| Others |
| FDO | Flight Deck Officer
| Others |
| FDO | Flight Dynamics Officer
| Others |
| FDO | For Dancers Only
| Others |
| FDO | For Deposit Only
| Others |
| FDO | For Display Only
| Others |
| FDO | Foreign Disclosure Office
| Others |
| FDO | Foreign Disclosure Officer
| Others |
| FDO | Form Definition Operator
| Others |
| FDO | Form Definition Order
| Others |
| FDO | Form Display Operation
| Others |
| FDO | Forward Design and Optimization
| Others |
| FDO | Foundation Directory Online
| Others |
| FDO | Freshman Dean's Office
| Others |
| FDO | Full Drain Outlet
| Others |
| FDO | Funatics Day Out
| Others |
| FDO | Function Device Object
| Others |
| FDO | Functional Device Object
| Others |
| FDO | Fundamental Deterioration Overview
| Others |
| FDO | Future Dark Overlord
| Others |