| IAHS | Illawarra Area Health Service 
| Others |
| IAHS | IMA Accounting Honor Society
| Others |
| IAHS | Independence Alternative High School
| Others |
| IAHS | Indiana Automotive Historical Society
| Others |
| IAHS | Infection Associated Hemophagocytic Syndrome
| Others |
| IAHS | Institute For Applied Health Science
| Others |
| IAHS | Institute For Applied Health Sciences
| Others |
| IAHS | Institute of Applied Health Sciences
| Others |
| IAHS | International Academy for Homeland Security
| Others |
| IAHS | International Academy of the History of Science
| Others |
| IAHS | International Association for Housing Science
| Others |
| IAHS | International Associoation of Hairdressing Schools
| Others |
| IAHS | Irish American Home Society
| Others |
| IAHS | Irish Association of Health Stores
| Others |
| IAHS | Itawamba Agricultural High School
| Others |