| Acronym | Definition |
|---|
| TDO | The Dark One |
| TDO | Toledo (Amtrak station code; Toledo, OR) |
| TDO | Tylko Dla Orlow (Polish: Where Eagles Dare) |
| TDO | Type Descriptor Object (Oracle Call Interface, 8.1) |
| TDO | Tobacco Documents Online (depository) |
| TDO | Typed Data Object |
| TDO | Type Definition Object |
| TDO | Test Data Output |
| TDO | Transverse Direction Orientation (plastics) |
| TDO | Technical Duty Officer (various organizations) |
| TDO | Temporary Detention Order |
| TDO | Test Data Out |
| TDO | Terminal Delivery Order (various companies) |
| TDO | Tropical Dance Orchestra |
| TDO | Typhoon Duty Officer |
| TDO | Training Development Officer (various organizations) |
| TDO | Technologie voor Duurzame Ontwikkeling |
| TDO | Technical Domain Owner (software) |
| TDO | This Dysfunctional Organization |
| TDO | Tallahassee Democrat Online |
| TDO | Typed Data Object (open source library) |
| TDO | Time Delay Opening |
| TDO | Temporary Deviation Order |
| TDO | Team Doggied Out (skateboarding) |
| TDO | The Delicious One (Wienerschnitzel mascot) |
| TDO | Term Determining Official |
| TDO | Team de Ouf (French gaming clan) |
| TDO | Transmitted Data Out |
| TDO | Theory of Design & Operation |
| TDO | Temporary Departmental Order (California State Government) |
| TDO | Technical Direction Order |
| TDO | Timed-Pulse Duration Output |
| TDO | Technical Development Options |
| TDO | Tapered Double Outer (roller bearings) |
| TDO | Tiro Dinamico Operativo (Italian) |
| TDO | Technical Directive Ordnance |
| TDO | Tachometer Drive Output |
| TDO | Temporary Deviation Ordinance |
| TDO | Task/Delivery Order |
| TDO | Transaction Data Object |
| TDO | Technical Development Organization (Syracuse, New York) |
| TDO | Traffic Data Operations (Washington Department of Transportation) |
| TDO | Track Day Organizer (racing) |
| TDO | Team Disney Orlando (Walt Disney World Resort administrative headquarters; Florida) |