| Abbreviation | Definition |
|---|---|
| IAPE | Israeli Association for Program Evaluation |
| IAPG | International Association for Promoting Geoethics |
| IAPH | International Association of Ports and Harbours |
| IAPH | Irish Association of Professional Historians |
| IAPHS | Interdisciplinary Association for Population Health Science |
| IAPM | International Association of Progressive Montessori |
| IAPM | International Association of Project Managers |
| IAPM | Irish Association of Physicists in Medicine |
| IAPO | Interamerican Association of Pediatric Otorhinolaryngology |
| IAPO | International Association of Professional Organizations |
| IAPO | Irish Association of Paediatric Osteopaths |
| IAPO | Irish Association of Prosthetists and Orthotists |
| IAPPC | Irish Association for Psychotherapy in Primary Care |
| IAPR | International Association of Pattern Recognition |
| IAPR | International Association of Permanent Representatives |
| IAPS | International Association for Presocratic Studies |
| IAPS | International Association for the Philosophy of Sport |
| IAPS | International Association of Planetary Sciences |
| IAPSC | Indiana Association of Professional Soil Classifiers |
| IAPSC | International Association of Professional Security Consultants |