DTI

• Deep trench isolation; See Shallow trench isolation
• Dial test indicator
• Direct trader input, in the history of electronic data interchange
• Diffusion tensor imaging, a structural magnetic resonance imaging technique
• Direct thrombin inhibitor
• Diesel turbo injection, a brand name for common rail
• Direct tension indicator
• Deep tissue injury, see suspected deep tissue injury in List of medical abbreviations: S
• Dye transfer inhibitor

• Defence Technology Institute, the Thai defence technology public organisation
• Department of Trade and Industry (disambiguation), a government department in several countries
• Detroit, Toledo and Ironton Railroad
• Diversified Technology, Inc.
• Directorate of Terrorist Identities, responsible for the Terrorist Identities Datamart Environment
• Display Technologies, Inc., a joint venture of IBM and Toshiba
• DT Infrastructure, Australian construction company

• Debt-to-income ratio, in the mortgage industry
• Dress to Impress, a video game on Roblox

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