- DRTT stands for Direction Régionale du Travail des Transports (French: Regional Directorate for Employment of Transportation)
- DRTT stands for Determination of Relevant Therapy Tool (clinical reasoning)
- DRTT stands for Décanat à la Recherche et au Transfert Technologique (French: Dean for Research and Technology Transfer; Canada)
- DRTT stands for Dial Repeating Tie Trunk
- DRTT stands for Direct Resourcing Think Tank
DRTT