- DTI (UK Department of Trade and Industry)
- DTIC ((U.S.) Defense Technical Information Center)
- DTIP (Disruptive Technology Innovations Partnership (DIA))
- DTK (Deception Tool Kit)
- DTL (Diode-Transistor Logic (electronics))
- DTLO (Doctrine, Training, and Leader Development)
- DTLOM (Doctrine, Training, Leadership, Organization, Materiel)
- DTLOMS (Doctrine, Training, Leader development, Organization, Materiel, and Soldier (mnemonic))
- DTLP (Doctrinal and Training Literature Program)
- DTLS (Descriptive Top-Level Specification)
- DTM (Deutsche Tourenwagen Masters (German, "German Touring Car Masters" – a current motor racing series))
- DTMA (Defence Transport and Movements Agency)
- DTMC (Delta Tributaries Mercury Council)
- DTMF (Dual-tone multi-frequency signaling)
- DTMP (Desk Top Music Production)
- DTMPN (Defect Test Monitor Phase Number)
- DTMR (Defense Traffic Management Regulation)
- DTN (Shreveport Downtown Airport)
- DTNT (Detent)
- DTO (Disruptive Technology Office (was ARDA))
