| T/TA | Training and Technical Assistance 
| Others |
| TTA | Table Tennis Australia
| Others |
| TTA | Tactical Terminal Adapter
| Others |
| TTA | Tal Toe Arthroplasty
| Others |
| TTA | Tallahassee Tennis Association
| Others |
| TTA | Tan Tan, Morocco
| Others |
| TTA | Tap That A**
| Others |
| TTA | Target Time of Arrival
| Others |
| TTA | Taste Tester Award
| Others |
| TTA | Teacher Training Agency
| Others |
| TTA | Teacher Training Agencyor To Take Away
| Others |
| TTA | Team Toyota Australia
| Others |
| TTA | Technology Transfer Alliance
| Others |
| TTA | Teeball Teachers Association
| Others |
| TTA | Telecom Technical assistant
| Others |
| TTA | Telecommunication Technology Association
| Others |
| TTA | Telecommunications Technology Association
| Others |
| TTA | Telegraphic Transfer Advance
| Others |
| TTA | Teletex Attachment
| Others |
| TTA | Temporary Transfer Assignment
| Others |
| TTA | Tennessee Telecom Association
| Others |
| TTA | Tennessee Telecommunications Association
| Others |
| TTA | Tennessee Theatre Association
| Others |
| TTA | Tennessee Trucking Association
| Others |
| TTA | Tennessee Turfgrass Association
| Others |
| TTA | Terran Trade Authority
| Others |
| TTA | Tesla Tech Arrays
| Others |
| TTA | Test Time Augmentation
| Others |
| TTA | Test Trend Analyzer
| Others |
| TTA | Tetanus Toxoid Antigen
| Others |
| TTA | Texas Telephone Association
| Others |
| TTA | Texas Thoroughbred Association
| Others |
| TTA | Texas Timing Association
| Others |
| TTA | Texas Transit Association
| Others |
| TTA | Texas Turfgrass Association
| Others |
| TTA | The Technology Transfer And Awareness
| Others |
| TTA | The Thinking Atheist
| Others |
| TTA | The Third Alternative
| Others |
| TTA | The Training Associates
| Others |
| TTA | The Transformer Association
| Others |
| TTA | The Transit Authority
| Others |
| TTA | The True Audio
| Others |
| TTA | The True Audio (CODEC)
| Others |
| TTA | Thermomechanical Test Area
| Others |
| TTA | Things To Avoid
| Others |
| TTA | This Time Around
| Others |
| TTA | Threads That Arent
| Others |
| TTA | Tibial Tuberosity Advancement
| Others |
| TTA | Tibial Tuberosity Advancemnt
| Others |
| TTA | Time To Action
| Others |
| TTA | Time To Activate
| Others |
| TTA | Time to Apogee
| Others |
| TTA | Time Triggered Architecture
| Others |
| TTA | To Take Away
| Others |
| TTA | To take away (drugs)
| Others |
| TTA | Toledo Technology Academy
| Others |
| TTA | Tommorowland Transit Authority
| Others |
| TTA | Tomorrowland Transit Authority
| Others |
| TTA | Top Tether Anchorage
| Others |
| TTA | Toronto Taxi Alliance
| Others |
| TTA | Toronto Trucking Association
| Others |
| TTA | Torpedo Tube Assembly
| Others |
| TTA | Torrance Teachers Association
| Others |
| TTA | Torsional Trailing a-Arm
| Others |
| TTA | Total Toe Arthroplasty
| Others |
| TTA | Tow Truck Act
| Others |
| TTA | Tower Top Amplifier
| Others |
| TTA | Toyota Team Argentina
| Others |
| TTA | Trade to Adopt
| Others |
| TTA | Trail Turn Assist
| Others |
| TTA | Training And Test Area
| Others |
| TTA | Transfer Triggered Architecture
| Others |
| TTA | Transformative Tech Academy
| Others |
| TTA | Transition Training Academy
| Others |
| TTA | Transport Triggered Architecture
| Others |
| TTA | Transportation Training Academy
| Others |
| TTA | transtibial amputation
| Others |
| TTA | transtracheal aspiration
| Others |
| TTA | Travel Time Advisory
| Others |
| TTA | Triangle Transit Authority
| Others |
| TTA | Triple Threat Academy
| Others |
| TTA | Troop Travel Application
| Others |
| TTA | Truck Training Academy
| Others |
| TTA | True Audio
| Others |
| TTA | True Tap Audio
| Others |
| TTA | Try Try Again
| Others |
| TTA | Trying To Avoid
| Others |
| TTA | Turbo Trans Am
| Others |