| Acronym | Definition |
|---|
| TTL | Total |
| TTL | Time To Live (IP networking) |
| TTL | Through The Lens (camera) |
| TTL | Transistor-Transistor Logic |
| TTL | Through The Line (advertising) |
| TTL | Take the L |
| TTL | Time to Leave |
| TTL | Tropospheric Transition Layer (atmosphere) |
| TTL | Time to Laugh |
| TTL | Task Team Leader |
| TTL | Thank the Lord |
| TTL | Technology for Teaching and Learning |
| TTL | Talk to You Later (text and chat slang; more commonly seen as TTYL) |
| TTL | Technical Team Leader |
| TTL | Time to Live |
| TTL | Twin Trapezoidal Link |
| TTL | Transistor to Transistor Logic |
| TTL | Tiny Template Library |
| TTL | Through the Lens |
| TTL | Tiptronic Turbo Look |
| TTL | Text Transfer Language |
| TTL | Test Technology Library |
| TTL | To Take Leave |
| TTL | Tata Teleservices, Ltd. (India) |
| TTL | Tagging, Tracking and Locating |
| TTL | Travel, Transportation and Logistics (industry sector) |
| TTL | Tietotekniikan Liiton |
| TTL | Type To Learn |
| TTL | Technology Transfer and Licensing (intellectual property) |
| TTL | Temporary Traffic Lights |
| TTL | Thomas Telford Ltd. (UK) |
| TTL | Torpedo Tube Launch |
| TTL | Teaching the Levees (New York) |
| TTL | Tax Title & License |
| TTL | Tribal Trust Land (land tenure designation) |
| TTL | The Textbook Letter (Textbook League) |
| TTL | Ticket Time Limit |
| TTL | Trauma Team Leader (emergency room; usually a staff surgeon) |
| TTL | Treasury Tax & Loan |
| TTL | Time Tracking Loop |
| TTL | Tractor Test Laboratory (University of Nebraska) |
| TTL | Transamerica Trailer Leasing Ltd. |
| TTL | Total Track Life |
| TTL | Task Table Listing |
| TTL | Total Terminals International (shipping) |
| TTL | Tomchei Tmimim Lubavitch (educational institution of the Lubavitch movement) |
| TTL | Tool-Trend Line |
| TTL | Transition Time Length (jitter) |
| TTL | Tout Tacot Limouxin (French automobile club) |