| IAAA | I Am An Accountant 
| Others |
| IAAA | I'm Asian American and
| Others |
| IAAA | Idaho Agricultural Aviation Association
| Others |
| IAAA | Idaho Athletic Administrators Association
| Others |
| IAAA | Ideal Active Achievement Award
| Others |
| IAAA | Identification Authentication Authorisation and Accountability
| Others |
| IAAA | Identification Authentication Authorization and Auditing
| Others |
| IAAA | IFOAM Amenity Agriculture Alliance
| Others |
| IAAA | Illinois Agricultural Auditing Association
| Others |
| IAAA | Illinois Agricultural Aviation Association
| Others |
| IAAA | Illinois Association for Advancement of Archaeology
| Others |
| IAAA | Imperial Aviation and Amplitude Authority
| Others |
| IAAA | Incheon Airport Aviation Academy
| Others |
| IAAA | INROADS Atlanta Alumni Association
| Others |
| IAAA | Institute for African American Affairs
| Others |
| IAAA | Institute of African American Affairs
| Others |
| IAAA | Institute of Artificial Art Amsterdam
| Others |
| IAAA | Insurance
| Others |
| IAAA | Inter- American Accounting Association
| Others |
| IAAA | International Academy of Aquatic Art
| Others |
| IAAA | International Air Ambulance Alliance
| Others |
| IAAA | International Assessment and Accreditation Alliance
| Others |
| IAAA | International Association of Astronomical Artists
| Others |
| IAAA | International Automotive Advertising Awards
| Others |
| IAAA | International Automotive Appraisers Association
| Others |
| IAAA | International Aviation Academy of Australia
| Others |
| IAAA | Iowa Agricultural Aviation Association
| Others |
| IAAA | Iowa Association of Adoption Agencies
| Others |
| IAAA | Ithaca Asian American Association
| Others |