| Abbreviation | Definition |
|---|---|
| IAUC | International Association of Urban Climate |
| IAVA | International Association of Virtual Assistants |
| IAVC | International Association for Visual Culture |
| IAVCEI | International Association of Volcanology and Chemistry of the |
| IAVM | International Association of Venue Managers |
| IAVS | International Association for Visual Semiotics |
| IAVWTR | International Association for Verification of World Trade Records |
| IAW | International Association of Women |
| IAWA | Illinois Association of Wastewater Agencies |
| IAWA | Independent Afghan Women Association |
| IAWA | International Active Women Association |
| IAWA | International Association of Wood Anatomists |
| IAWA | Iowa Association of Water Agencies |
| IAWA | Italian American Writers Association |
| IAWC | Interpretive Association of Western Colorado |
| IAWC | Islamic Association of Western Canada |
| IAWD | Illinois Association of Wholesale Distributors |
| IAWE | International Association for Wind Engineering |
| IAWE | International Association for World Englishes |
| IAWE | International Associations for Wind Engineering |