| Acronym | Definition |
|---|
| ITIS | Integrated Taxonomic Information System |
| ITIS | Istituto Tecnico Industriale Statale (Italian: State Industrial Technical Institute) |
| ITIS | Information Technology in School |
| ITIS | Integrated Transport Information System |
| ITIS | International Trade Institute of Singapore |
| ITIS | Information Technology Infrastructure Services |
| ITIS | International Tourism Institute |
| ITIS | Information Technology Insurance Specialists |
| ITIS | Internet Travel Information Service |
| ITIS | International Taxonomic Information System |
| ITIS | Integrating Technologies for Interactive Stories |
| ITIS | International Trade Information Service |
| ITIS | Integrated Technical Information Services |
| ITIS | Interim Test Item Simulator |
| ITIS | Intelligent Transportation Infrastructure System |