| Abbreviation | Definition |
|---|---|
| ITRCC | Indiana Toll Road Concession Company |
| ITRI | Industrial Technology Research Institute (Taiwan) |
| ITRIS | Independent Trading Rework and Informatics Services |
| ITRL | Intoll Toronto Roads Limited |
| ITS | Interglobal Telecom Solutions |
| ITSA | Independent Testing Service of Australia |
| ITSA | Information Technology Services Agency |
| ITSA | Insolvency and Trustee Service Australia |
| ITSA | Interactive Travel Services Association |
| ITSA | International Training and Simulation Alliance |
| ITSB | Institut Teknologi dan Sains Bandung |
| ITSC | Information Technology Support Center |
| ITSC | Instructional Technology Systems Consultancy |
| ITSI | Insight Technical Services Inc |
| ITSI | Integrated Technology Solutions Inc |
| ITSL | India Transact Services Ltd |
| ITSMA | Information Technology Services Marketing Association |
| ITSMFI | Information Technology Service Management Forum International |
| ITSPG | Inter-modal Transportation Services and Purchasing Group |
| ITT | International Telephone And Telegraph |