| Abbreviation | Definition |
|---|---|
| HYS | Harvard, Yale, Stanford |
| HYT | High Year of Tenure |
| HYWW | Hamline Young Writers Workshop |
| HZU | Himgiri Zee University |
| i.e. | Id Est (Latin: For Example) |
| I2 | Internet 2 |
| IA | Industrial Archaeology |
| IA | Industrial Art |
| IA | Instructor A |
| IA | International Academy |
| IAAR | Institute of African American Research |
| IAAS | Inner Asian and Altaic Studies |
| IAAT | Indian Academy of Aeronautical Technology |
| IAAU | International Ataturk Alatoo University |
| IAC | Inter-Academy Council |
| IAC | International Agricultural Centre |
| IACES | International Association of Civil Engineering Students |
| IACH | Institute for the American Constitutional Heritage |
| IACR | Institute for Applied Community Research |
| IACS | Institute for Applied Computational Science |