| Abbreviation | Definition |
|---|---|
| HRIC | Human Relations Institute and Clinics |
| HRIMS | Hotel Restaurant Institution Management Society |
| HSCI | Harvard Stem Cell Institute |
| HSCI | Hispanic Student College Institute |
| HSCI | Human Stem Cells Institute |
| HSEI | Health Safety and Environment Institute |
| HSEI | Health Sciences Enrichment Institute |
| HSEI | High School Engineering Institute |
| HSI | Health Safety Institute |
| HSI | Health Science Institute |
| HSI | Health Sciences Institute |
| HSI | Health Systems Institute |
| HSI | High School Institute |
| HSI | Hispanic Servicing Institute |
| HSI | Hispanic Serving Institutions |
| HSIC | Health Sciences Institute of California |
| HSLI | High School Law Institute |
| HSLI | High School Leadership Institute |
| HSLI | Homeland Security Law Institute |
| HSPI | Health Strategy and Policy Institute |