| ITR | Icy Tower Replay 
| Others |
| ITR | Ignition Timing Retard
| Others |
| ITR | Image Tools Resource
| Others |
| ITR | Implicit Tax Rate
| Others |
| ITR | Imposto Territorial Rural
| Others |
| ITR | Improved Terrain Representative
| Others |
| ITR | In The Rain
| Others |
| ITR | In The Raw
| Others |
| ITR | In the Red
| Others |
| ITR | In The Rooms
| Others |
| ITR | Income Tax Rates
| Others |
| ITR | Income Tax Received
| Others |
| ITR | Income Tax Reference
| Others |
| ITR | Income Tax Return
| Taxation |
| ITR | Income Tax Returns
| Others |
| ITR | Indiana Theory Review
| Others |
| ITR | Indiana Toll Road
| Others |
| ITR | Individually Tailored Relevant
| Others |
| ITR | Ineligible to Re
| Others |
| ITR | Ineligible To Return
| Others |
| ITR | Infantry Training Regiment
| Others |
| ITR | Inferior Turbinate Reduction (sinus surgical procedure)
| Others |
| ITR | Information Technology and Research
| Others |
| ITR | Information Technology and Resources
| Others |
| ITR | Information Technology Request
| Others |
| ITR | Information Technology Research
| Others |
| ITR | Information Technology Resources
| Others |
| ITR | Information Ticketing and Registration
| Others |
| ITR | Information Ticketing Registration
| Others |
| ITR | Information Tickets and Registration
| Others |
| ITR | Information Tickets and Reservations
| Others |
| ITR | Information Transfer Rate
| Others |
| ITR | Information Transformation Rate
| Others |
| ITR | Initial Technical Review
| Others |
| ITR | Innovative Technology Regulation
| Others |
| ITR | Inpatient Treatment Report
| Others |
| ITR | Input Throughput Rate
| Others |
| ITR | Inquiry To Remittance
| Others |
| ITR | Insane Trail Riders
| Others |
| ITR | Inspection and Test Report
| Others |
| ITR | Inspection and Test Request
| Others |
| ITR | Instant Timer Recording
| Others |
| ITR | Institute for Translational Research
| Others |
| ITR | Instrument Technical Room
| Others |
| ITR | Insurance Technical Reserves
| Others |
| ITR | Intake Transfer and Release
| Others |
| ITR | Integra Type R
| Others |
| ITR | Integra Type-R
| Others |
| ITR | Integrated Test Range
| Military |
| ITR | Intelligent Tracking and Recognition
| Others |
| ITR | Intelligent Traffic Regulations
| Others |
| ITR | Intensive Training Regiment
| Others |
| ITR | Intent To Register
| Others |
| ITR | Interactive Text Response
| Others |
| ITR | Interim Test Range
| Others |
| ITR | Interim Therapeutic Restorations
| Others |
| ITR | Internal Technical Report
| Others |
| ITR | Internal Throughput Rate
| Others |
| ITR | International Tax Review
| Others |
| ITR | International Telecommunication Regulations
| Others |
| ITR | International Thermal Research
| Others |
| ITR | International Travel Registry
| Others |
| ITR | International Treasury Request
| Others |
| ITR | Internationale Tourenwagen Rennen
| Others |
| ITR | Internationale Traditions Rallye
| Others |
| ITR | Internationales Trabant Register
| Others |
| ITR | Internet Talk Radio
| Others |
| ITR | Internet Telephone Router
| Others |
| ITR | Internet Threat Report
| Others |
| ITR | Internet Traffic Report
| Others |
| ITR | Intuitive Throttle Response
| Others |
| ITR | Inventory Turn Rate
| Others |
| ITR | Inverted Terminal Repeat
| Others |
| ITR | Investigational Trials Resource
| Others |
| ITR | Invisible Thread Real
| Others |
| ITR | Invisible Thread Reel
| Others |
| ITR | Irrevocable Trust Receipt
| Others |
| ITR | Israel Trauma Registry
| Others |
| ITR | It Turned Real
| Others |
| ITR | ITinerary Receipt
| Others |
| ITR | Trends Report
| Others |