| Acronym | Definition |
|---|
| IUAA➣Indiana University Alumni Association |
| IUAA➣Irish Universities Athletics Association (est. 1873) |
| IUAA➣International Union of Advertisers Associations (est. 1953; now World Federation of Advertisers) |
| IUAA➣International Union of Alpine Associations |
| IUAA➣Illinois Uniform Arbitration Act |
| IUAA➣Inner Urban Areas Act (UK) |