| Abbreviation | Definition |
|---|---|
| HWI | Healthcare Waste Institute |
| HWNI | Helen Wills Neuroscience Institute |
| HYI | Harvard Yenching Institute |
| HYI | Hendrix Youth Institute |
| I3L | Indonesia International Institute for Life Sciences |
| IAA | Institute for Assured Autonomy |
| IAA | Institute of Accountancy Arusha |
| IAAA | Institute for African American Affairs |
| IAAA | Institute of Artificial Art Amsterdam |
| IAAC | Institute for Advanced Architecture of Catalonia |
| IAAD | Institute for Asia and Asian Diasporas |
| IAAMC | Institute for African American Mentoring in Computing |
| IAAR | Institute for African American Research |
| IAAS | Institute Of Aerospace And Automotive Studies |
| IAAS | Institute Of Aquatic And Atmospheric Sciences |
| IABA | Institute for Applied Behavior Analysis |
| IABF | Institute of Accounts Business and Finance |
| IABF | Institute of Accounts Business Finance |
| IABI | International Association of Bible Institutes |
| IABM | Institute of Agri Business Management |