| Acronym | Definition |
|---|
| IAAP | International Association of Administrative Professionals (formerly PSI, Professional Secretaries International) |
| IAAP | International Association of Applied Psychology |
| IAAP | International Association for Analytical Psychology |
| IAAP | Iowa Army Ammunition Plant |
| IAAP | International Association of Advisors in Philanthropy |
| IAAP | Information Assurance Assessment and Assistance Program (US DoD) |
| IAAP | Illinois Association of Aggregate Producers |
| IAAP | International Association of Architectural Photographers |
| IAAP | Initiative Assessment & Approval Process (various companies) |
| IAAP | If At All Possible |
| IAAP | Intensive Agricultural Area Program (India) |
| IAAP | Illinois Association of Addiction Professionals |
| IAAP | International Association of Administrative Personnel |
| IAAP | Interface Acquisition Approach Plan |
| IAAP | Information Assurance Awareness Program (USAF computer security) |
| IAAP | I am a Professor (Internet slang) |