| Acronym | Definition |
|---|
| TTA | Tomorrowland Transit Authority (Walt Disney World) |
| TTA | Teacher Training Agency (UK) |
| TTA | Triangle Transit Authority |
| TTA | Triangle Transit Authority (Raleigh/Chapel Hill/Durham, North Carolina, USA) |
| TTA | Telecommunications Technology Association (Korea) |
| TTA | Time Triggered Architecture |
| TTA | To Take Away (UK medications supplied on hospital discharge) |
| TTA | Transport Triggered Architecture |
| TTA | Texas Telephone Association |
| TTA | Time to Answer |
| TTA | Turbo Trans-Am (Pontiac) |
| TTA | Tri-State Transit Authority (Huntington, WV) |
| TTA | Try Try Again |
| TTA | Technology Transfer Agreement |
| TTA | Tennessee Trails Association (hiking organization) |
| TTA | Telecom Technical Assistant |
| TTA | Technology Transition Agreement |
| TTA | Tennessee Telecommunications Association |
| TTA | Trans Texas Airways |
| TTA | Top Teens of America |
| TTA | Type-Tested Assembly |
| TTA | Time to Alarm |
| TTA | Tomorrowland Transportation Authority (Disney) |
| TTA | Tuition Trust Authority |
| TTA | Trauma Team Activation (hospital/traumacenters) |
| TTA | Tactical Terminal Adapter |
| TTA | Tunisian Travel Agency (Tunisia; est. 1998) |
| TTA | Total Tangible Assets |
| TTA | Tri-p-Tolylamine |
| TTA | Technical Task Agreement |
| TTA | Triple Triad Advance (Final Fantasy minigame) |
| TTA | Tiger Team Assessment |
| TTA | Tree Top Airways (humor) |
| TTA | Triage and Treatment Area (emergency medicine) |
| TTA | Tailored Training Approach |
| TTA | Talking to Americans (Canadian TV show) |
| TTA | Tree-Trellis Algorithm |
| TTA | Torah Tidbits Audio (weekly radio program in Israel and on the Web) |
| TTA | Telecommunications Technical Associate |
| TTA | Tshwane Tourism Association (South Africa) |
| TTA | Tactical Terrain Analyzer |
| TTA | Two Tone Alarm (same as TTAA) |
| TTA | Touch Them All |
| TTA | Travel Time Authorized |
| TTA | Turkey Toilet Association |
| TTA | Touch Tone Arrangement |
| TTA | Top Talent Award (Europrix) |