| Abbreviation | Definition |
|---|---|
| ITEA | International Technology Education Association |
| ITFMA | IT Financial Management Association |
| ITGS | Information technology in a global society |
| ITMS | International Thomas Merton Society |
| ITS | Institute for Technology and Society |
| ITS | International Telecommunications Society |
| ITS | International Thermoelectric Society |
| ITSL | Information Technology Society and Law |
| ITSN | Information Technology Society Nepal |
| ITSS | Intelligent Transportation Systems Society |
| ITWS | Indian Tiger Welfare Society |
| IUA | International Union of Academies |
| IUA | International Union of Architects |
| IUA | Union Académique Internationale |
| IUA | Union Acadmique Internationale |
| IUA | Union Internationale des Architectes |
| IUAC | Union Internationale Contre le Cancer |
| IUAES | International Union of Anthropological and Ethnological Sciences |
| IUAES | Union Internationale des Sciences Anthropologiques et Ethnologiques |
| IUBS | Union Internationale des Sciences Biologiques |