| Acronym | Definition |
|---|
| TTO | This Trip Only (casino credit) |
| TTO | Talk To (command in the LOGO programming language) |
| TTO | Trinidad and Tobago (ISO Country code) |
| TTO | Tea Tree Oil |
| TTO | Tractor Trailer Operator |
| TTO | Technology Transfer Office |
| TTO | Thermal Transfer Overprinting (various companies) |
| TTO | Time Trade-Off |
| TTO | Total Toxic Organics |
| TTO | To Take Out (prescriptions in hospital discharge summary) |
| TTO | Tactical Technology Office (DARPA) |
| TTO | Tortoise Capital Resources Corporation (stock symbol) |
| TTO | Triple Trend Oscillator (finance) |
| TTO | Transtracheal Oxygen |
| TTO | Training Time Out |
| TTO | Three True Outcomes (baseball) |
| TTO | ToonTown Online (game) |
| TTO | Technology Transition Office (US DoD) |
| TTO | Transmission Top-Off (automotive assembly) |
| TTO | Technical Task Order |
| TTO | Transient Tracers in the Oceans |
| TTO | Trailing Throttle Oversteer |
| TTO | Triple Tibial Osteotomy (veterinary medicine) |
| TTO | Test Time Objective (disaster recovery) |
| TTO | Tool Try Out |
| TTO | Technical Training Organization (Texas Instruments, Inc.) |
| TTO | Time to Onset (medical manifestation) |
| TTO | Transition to Operations |
| TTO | Tactile Technology Office |
| TTO | Thermal Transfer Overlay (printers) |
| TTO | Technical Training Officer |
| TTO | Tourist Third Open (railways; UK) |
| TTO | Transnational Terrorist Organization |
| TTO | Tourism Training Organisation |
| TTO | Tanker Take Over |