| Abbreviation | Definition |
|---|---|
| IAHC | International Association of Human Caring |
| IAHD | Idaho Association of Highway Districts |
| IAHD | International Association for Handicapped Divers |
| IAHD | International Association of Handicapped Divers |
| IAHD | International Association of Health Dowsers |
| IAHE | Illinois Association of Highway Engineers |
| IAHE | International Association of Hotel Executives |
| IAHFIAW | International Association of Heat and Frost Insulators and Allied Workers |
| IAHFIAW | International Association of Heat Frost Insulators Asbestos Workers |
| IAHP | International Association of Healthcare Practitioners |
| IAHP | International Association of Holistic Psychology |
| IAHP | International Association of Hygienic Physicians |
| IAHPC | Illinois Association of Historic Preservation Commissions |
| IAHPC | International Association for Hospice Palliative Care |
| IAHPC | International Association of Hospice and Palliative Care |
| IAHPC | Irish Association for High Performance Computing |
| IAHR | International Association of Healing Rooms |
| IAHS | Irish Association of Health Stores |
| IAHSS | International Association of Healthcare Security Safety |
| IAHV | International Association of Human Values |