| Abbreviation | Definition |
|---|---|
| IAGA | Indian Association of Greater Athens |
| IAGA | Indo American Golf Association |
| IAGA | International Association of Gaming Advisors |
| IAGA | International Association of Golf Administrators |
| IAGA | invasion association gene A |
| IAGC | Illinois Association for Gifted Children |
| IAGC | India Association of Greater Charleston |
| IAGC | International Association for Generative Change |
| IAGC | International Association of Geophysical Contractors |
| IAGI | International Association of Geosynthetic Installers |
| IAGR | International Association for Gondwana Research |
| IAHA | Idaho Amateur Hockey Association |
| IAHA | Independence Airpark Homeowners Association |
| IAHA | Ithaca Adult Hockey Association |
| IAHAIO | International Association of Human Animal Interaction Organisations |
| IAHAIO | International Association of Human Animal Interaction Organizations |
| IAHB | International Association of Human Biologists |
| IAHC | Idaho Association for Home Care |
| IAHC | International Association for Health Coaches |
| IAHC | International Association of Health Coaches |