- 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))
