| Acronym | Definition |
|---|
| RTI | Response to Intervention (education) |
| RTI | Research Triangle Institute |
| RTI | Right to Information Act (India) |
| RTI | Radio Taiwan International |
| RTI | Real Time Interface |
| RTI | Real Time Interface (GCCS) |
| RTI | RightNow Technologies, Inc. (software; Bozeman, MT) |
| RTI | Research Technologies, Inc. |
| RTI | Research and Technological Innovation (various organizations) |
| RTI | Road Traffic Injury (accident statistics) |
| RTI | Real-Time Innovations, Inc (Sunnyvale, CA) |
| RTI | Return from Interrupt |
| RTI | Real Time Infrastructure |
| RTI | Route Terminating Indicator |
| RTI | Real Time Interactive |
| RTI | Real Time Interrupt |
| RTI | Road and Traffic Information |
| RTI | Real-Time Infrastructure |
| RTI | Real Time Information |
| RTI | Respiratory Tract Infection |
| RTI | Regional Training Institute |
| RTI | Return from Interrupt (assembly language) |
| RTI | Ramp Travel Index (4x4) |
| RTI | Reproductive Tract Infection |
| RTI | Reverse Transcriptase Inhibitor |
| RTI | Runtime Infrastructure (1999 Defense Technology Area Plan for Information Systems Technology, Chapter III) |
| RTI | Rockwool Technical Insulation (Netherlands) |
| RTI | Real Time Integration |
| RTI | Related Technical Instruction (various organizations) |
| RTI | Road and Traffic Information (Volvo) |
| RTI | Ready to Install |
| RTI | Response Time Index (fire sprinklers) |
| RTI | Radiodiffusion Télévision Ivoirienne (Abidjan, Ivory Coast) |
| RTI | Real Time Intelligence |
| RTI | Regional Technology Integration (US DHS) |
| RTI | Restaurant Technology, Inc. (Marietta, GA) |
| RTI | Rates Technology, Inc. (patents) |
| RTI | Relative Temperature Index |
| RTI | Road Traffic Incident |
| RTI | Run Time Interface |
| RTI | Range-Time Intensity |
| RTI | Recycle Technologies International (Labelle, FL) |
| RTI | Route Index |
| RTI | Referred to the Input |
| RTI | Real Time Interruption |
| RTI | Roof Tile Institute |
| RTI | ReAble Therapeutics, Inc. (formerly Encore Medical Corporation) |
| RTI | Research Tactical Idea (Morgan Stanley) |
| RTI | Radio-Technology-Independent |
| RTI | Relational Technology Incorporated |
| RTI | Radar Target Identification |
| RTI | Reflection Transformation Imaging |
| RTI | Research Technologies International (Lincolnwood, Illinois) |
| RTI | Receiver Transmitter Interface |
| RTI | Reclamecode Voor Telefonische Informatiediensten (Dutch) |
| RTI | Residency Training Initiative |
| RTI | Reprographic Technologies, Inc. (Milwaukee, WI) |
| RTI | Refer to Input |
| RTI | Romanticism through Impressionism (course) |
| RTI | Roadway Type Identifier |
| RTI | Rebound Therapy Institute (therapeutic trampoline exercise and training courses; various locations; UK) |
| RTI | Refuge Trust International |
| RTI | Run Time Interconnect |
| RTI | Request To Import (shipping industry) |
| RTI | Remote Tactical Information |
| RTI | Release to Implementation |
| RTI | Recrutement Intérim (French: Interim Recruitment) |
| RTI | Rai TV Italian |