| Acronym | Definition |
|---|
| TDA | Training and Development Agency for Schools (London, UK) |
| TDA | Texas Department of Agriculture |
| TDA | Trade and Development Agency |
| TDA | Transportation Development Act |
| TDA | Tax Deferred Annuity (commonly known as TSA) |
| TDA | Transboundary Diagnostic Analysis |
| TDA | Tienda (Spanish: store) |
| TDA | Those Darn Accordions (band, San Francisco, California) |
| TDA | Tournament Directors Association |
| TDA | Table of Distribution and Allowances (US Army) |
| TDA | Tennessee Department of Agriculture |
| TDA | Texas Dental Association |
| TDA | Toluenediamine |
| TDA | Tactical Decision Aid |
| TDA | Technical Design Authority |
| TDA | Transportation Development Association (Madison, WI) |
| TDA | Tennessee Dental Association |
| TDA | Tamm-Dancoff Approximation |
| TDA | Trade Descriptions Act (UK) |
| TDA | Time Domain Analysis |
| TDA | Turkish Dental Association |
| TDA | The Dark Arts (fan fiction) |
| TDA | Time Difference of Arrival |
| TDA | Thailand Darts Association |
| TDA | Technical Direction Agent |
| TDA | Taxpayer Delinquent Account (IRS) |
| TDA | Team Disney Anaheim |
| TDA | Toonami Digital Arsenal |
| TDA | Total Disc Arthroplasty |
| TDA | Technology Development Approach |
| TDA | Total Drainage Area |
| TDA | Training Delivery Agent |
| TDA | Team DotA Allstars (gaming clan) |
| TDA | Temporary Danger Area |
| TDA | Target Damage Assessment |
| TDA | Traffic Data Acquisition |
| TDA | Tigrai Development Association |
| TDA | Technical Design Architect (Cisco) |
| TDA | Transit Detection Algorithm (used to find new planets) |
| TDA | Tunnel Diode Amplifier |
| TDA | Table of Distribution & Allowance(s) |
| TDA | Tax Delinquent Account |
| TDA | Terminal Data Adapter |
| TDA | Test Design Automation |
| TDA | Term Deposit Account |
| TDA | Training Development Advisor |
| TDA | Tracking & Data Acquisition |
| TDA | Treasury Department Acquisition |
| TDA | Torpedo Danger Area |
| TDA | Turkish Dance Association |
| TDA | Time Domain Aliasing |
| TDA | Tidewater Dietetic Association |
| TDA | Tactical Development Agent |
| TDA | Trade Desk America |
| TDA | Table of Distribution-Augmentation |
| TDA | Tactical Digital Assistants |
| TDA | Tactical Data Application (Navy) |
| TDA | Theater Defense Aviation |
| TDA | Taking & Driving Away (Criminology, UK) |
| TDA | Temporary Duty Assigned |
| TDA | Technology Development Agent |
| TDA | Time/Date Adjust |
| TDA | Technical Direction Authority |
| TDA | Technical Directing/Direction Agency |
| TDA | Technical Document Architecture |
| TDA | Textile Distributors Association, Inc. |
| TDA | Tactical Data Aids |