| Abbreviation | Definition |
|---|---|
| HULKEX | Hulk Exercise (naval exercise: US and Australia) |
| HVIA | Heavy Vehicle Industry Australia |
| HWTA | Healthy Water Technologies Australia |
| IAASA | Indian Australian Association of South Australia |
| IAASA | Inland Aquaculture Association of South Australia |
| IABW | Indonesia Australia Business Week |
| IACA | Institute of Australian Consulting Arboriculturists |
| IAG | Insurance Australia Group |
| IAHA | Indigenous Allied Health Australia |
| IAIE | Institute for Australia India Engagement |
| IAMA | Institute of Arbitrators Mediators Australia |
| IASC | Introducing Australia Studies Centre |
| IASS | Indigenous Australian Student Services |
| IATG | Institute of Australian Tour Guides |
| IAWB | Irish Australian Welfare Bureau |
| IBA | Indigenous Business Australia |
| IBAC | Independent Broad-based Anti-corruption Commission |
| IBRA | Interim Biogeographic Regionalisation for Australia |
| IBRA | Interim Biogeographic Regionalisation of Australia |
| IBSA | Innovation and Business Skills Australia |