| Acronym | Definition |
|---|
| DTT | Dithiothreitol (cytology reagent) |
| DTT | Digital Terrestrial Television |
| DTT | Deloitte Touche Tohmatsu (Deloitte & Touch Global Operations) |
| DTT | Driver Theory Test (Ireland) |
| DTT | Degroote Trucks & Trailers (Belgium) |
| DTT | Double Taxation Treaty |
| DTT | Discrete Trial Training (Applied Behavior Analysis) |
| DTT | Diffusion Tensor Tractography (radiology) |
| DTT | Desk Top Theatre |
| DTT | Dual Transformer Technology |
| DTT | Desk Top Tools |
| DTT | Direction des Transports Terrestres (French: Department of Land Transport; various locations) |
| DTT | Développement Touristique du Territoire (French: Tourism Development Planning) |
| DTT | Development and Transfer of Technologies (climate change; UN) |
| DTT | Department of Teacher Training (various locations) |
| DTT | Digital Terrestrial Transmission |
| DTT | Dansk Teologisk Tidsskrift (Danish: Danish Theological Journal) |
| DTT | Dry Type Transformer |
| DTT | Demeures, Terre et Tradition (French: Homes, Land and Tradition) |
| DTT | Detent |
| DTT | Domestic Technology Transfer |
| DTT | Desktop Theater (Cambridge Soundworks speakers) |
| DTT | Direct Transfer Trip (relaying system) |
| DTT | Direct Tension Tester |
| DTT | Direct Trunked Transport |
| DTT | Distance to Target |
| DTT | D-Link Technology Trend |
| DTT | Damoiseau Tous Terrassements (French construction firm) |
| DTT | Dynamic Terabit Testing (Agilent) |
| DTT | Diesel Transmission Technology |
| DTT | Distributive Training Technology |
| DTT | Desk Top Trainer |
| DTT | Design Thermal Transient |
| DTT | Difference Threshold Test |
| DTT | Diffusion Transfer Technology |
| DTT | Data Transfer Type |
| DTT | Dynamic Test Target |
| DTT | Datum Temporal Token |
| DTT | Distribution, Transformation and Trading (Arcelor Corporation) |
| DTT | Defense Technology Towers (Singapore) |
| DTT | Developmental Technician Team |
| DTT | Doctrine Training Team |
| DTT | Doctrine & Tactics Training |
| DTT | Dorsal Trigeminothalamic Tract (brain) |