DTI
- DT Infrastructure
- Debt-to-income ratio
- Defence Technology Institute
- Department of Trade and Industry (disambiguation)
- Detroit, Toledo and Ironton Railroad
- Dial test indicator
- Diffusion tensor imaging
- Direct tension indicator
- Direct thrombin inhibitor
- Display Technologies, Inc.
- Diversified Technology, Inc.
- Dress to Impress (video game)
- Roblox
- Shallow trench isolation
- Terrorist Identities Datamart Environment