| Acronym | Definition |
|---|
| ITR | In the Rooms (recovery network) |
| ITR | Informações Trimestrais (Brazilian financial quarterly) |
| ITR | Income Tax Return |
| ITR | Integra Type R (Acura automobile) |
| ITR | Internet Threat Report |
| ITR | Internal Throughput Rate |
| ITR | Input Throughput Rate |
| ITR | Information Transfer Rate (brain-computer interface assessment) |
| ITR | International Telecommunications Regulations (World Administrative Telegraph and Telephone Conference) |
| ITR | In the Red (record label) |
| ITR | International Translation Resources (UK) |
| ITR | Inverted Terminal Repeat (gene sequence) |
| ITR | Information Technology Research |
| ITR | Internet Talk Radio |
| ITR | Information Technology Resources |
| ITR | Independent Technical Review |
| ITR | Inpatient Treatment Report |
| ITR | Institute for Telecommunications Research (Adelaide, South Australia) |
| ITR | Internet Traffic Report |
| ITR | Indemnité Temporaire de Retraite (French: Temporary Retirement Allowance) |
| ITR | Industry Technology Roadmap (various organizations) |
| ITR | Investigational Trials Resource (Helen Diller Family Comprehensive Cancer Center; San Francisco, CA) |
| ITR | Inflation Targeting Regime (economics) |
| ITR | Institute for Technological Research (various locations) |
| ITR | Industry, Tourism and Resources (Australia) |
| ITR | Individual Training Record (various locations) |
| ITR | Institute for Tuberculosis Research (Univesity of Illinois at Chicago) |
| ITR | Industrial to Residential (zoning) |
| ITR | Information, Ticketing and Registration |
| ITR | Invisible Thread Reel (levitation magic tricks device) |
| ITR | Infantry Training Regiment |
| ITR | Invitation To Register (Interest) |
| ITR | Institut du Transport Routier (Belgium) |
| ITR | Itchy Tasty Records (record label; Los Angeles, CA) |
| ITR | Inside Texas Running (periodical) |
| ITR | Input Transaction Record |
| ITR | Information Technology Review |
| ITR | Improved TARTAR Retrofit |
| ITR | Information Technology Representative |
| ITR | Independent Tank Regiment |
| ITR | Innovative Technology Requirement (environment) |
| ITR | Interpolation Timing Recovery |
| ITR | Ineligible to Re-Register (college) |
| ITR | Internal Transfer Rate (Seagate) |
| ITR | Inspection and Test Records |
| ITR | Integrated Test Requirements |
| ITR | Integrated Technology Rotor |
| ITR | Internal Transfer Report |
| ITR | Intermediate Care Nursery |
| ITR | Instrumented Test Range |
| ITR | Intelligent Transaction Router (Delta) |
| ITR | Inventory Turn Rate |
| ITR | International Trade Resources LLC (Washington, DC) |
| ITR | Issue Tracking Request |
| ITR | Instrument Technical Room |
| ITR | Institute of Tobacco Research |
| ITR | Independent Telephone Research (California) |
| ITR | Irrevocable Trust Receipt |
| ITR | Industrial Technology Reliability Company (Bethlehem, PA) |
| ITR | Individual Tailored Roadmap (NATO) |
| ITR | Installation Technical Representative (contract services; US DoD) |