DTI Danish Technological Institute
DTI Dawe Charitable Trust (UK)
DTI Debt to Income (ratio)
DTI Deep Trench Isolation
DTI Defense Technology Incorporated & Associates
DTI Delayed Turn-In (US Navy Supply)
DTI Delivery Ticket Invoice
DTI Departamento Tecnico de Investigacion
DTI Department of Trade and Industry
DTI Desktop Item
DTI Detective Training Institute
DTI Detroit, Toledo, & Ironton (Railroad)
DTI Dial Test Indicator (mechanical measuring device used in machining)
DTI Diesel Turbo Intercooler (automobile)
DTI Diffusion Tensor Imaging
DTI Digital Technologies, Inc.
DTI Digital Test Interface (Tollgrade)
DTI Digital Trunk Interface
DTI Digital Trunk Interface Frame (Sprint)
DTI Direct Tension Indicator (Applied Bolting Technology Products, Inc.)
DTI Direct Thrombin Inhibitor
DTI Directed Technologies, Inc.
DTI Diversified Technology, Inc.
DTI Don't Try It
DTI Driving Trend Identifier
DTI Dynamic Telecommunications, Inc.
DTI Dynamic Tomographic Imaging
DTI Dynamics Technology, Incorporated (defense contractor in Torrance, California)
Could mean bloody anything, just ask them.