| Acronym | Definition |
|---|
| IUA | International Underwriting Association of London (formerly London International Insurance and Reinsurance Market Association; UK) |
| IUA | Irish Universities Association |
| IUA | Isdn User Adaptation |
| IUA | International Underwriting Association |
| IUA | ISDN Q-921-User Adaptation Layer |
| IUA | International Union of Architects |
| IUA | Instituto Universitario Aeronáutico (Argentina Air Force University) |
| IUA | International University Audentes (Estonia) |
| IUA | Intra-Uterine Adhesion (reproduction) |
| IUA | Integrated Unit of Analysis (South Africa) |
| IUA | Instrument Unit Avionics (various organizations) |
| IUA | International University of Africa (Sudan) |
| IUA | Internet Use Agreement (education) |
| IUA | Ingres Users Association (various locations) |
| IUA | International Union of Academies |
| IUA | Image Understanding Architecture |
| IUA | Individual User Authentication (Cisco) |
| IUA | Individual Unemployment Account |
| IUA | Institut Universitari de l'Audivisual |
| IUA | ISSE User Agent |