| Abbreviation | Definition |
|---|---|
| HGI | Houston Galveston Institute |
| HGPI | Health and Global Policy Institute |
| HGPI | Houston Galveston Psychoanalytic Institute |
| HHHI | Hilton Head Health Institute |
| HHI | Haitian Health Institute |
| HHI | Healthy House Institute |
| HHI | Heinrich Hertz Institute |
| HHI | Heinrich Hertz Institute's |
| HHI | Henry Henderson Institute |
| HHRI | Heartland Health Research Institute |
| HHTI | Huruma Health Training Institute |
| HIA | Hemispheric Institute on the Americas |
| HIAI | Harris Institute for Assured Information |
| HIAL | Higher Institute of Applied Learning |
| HIAL | Himalayan Institute of Alternatives Ladakh |
| HIAS | Hagler Institute for Advanced Study |
| HIBA | Higher Institute of Business Administration |
| HIBC | Highland Institute for Behavioral Change |
| HICA | Halsey Institute of Contemporary Art |
| HICA | Haryana Institute Of Civil Aviation |