| Abbreviation | Definition |
|---|---|
| HSM | Hearst Student Media |
| HSNA | Hispanic Student Nursing Association |
| HSNA | Hope Student Nurses Association |
| HSO | Hindu Students Organization |
| HSO | Honors Student Organization |
| HSO | Honors Student Orientation |
| HSO | Honors Students Organization |
| HSPVA | High School for the Performing and Visual Arts |
| HSSA | Health Sciences Students Association |
| HSSA | Human Services Student Association |
| HSSC | Hawaii State Student Council |
| HSSC | Health Sciences Students Council |
| HSSLC | High School Student Leadership Conference |
| HSSS | High School Student Services |
| HSTO | Harvard Student Telephone Office |
| HSWN | Heraklion Student Wireless Network |
| HTN | Hack The North |
| HUSA | Hmong University Student Association |
| HUSTLE | Helping Undergraduate Students Tackle Leadership and Entrepreneurship |
| IAESTE | International Association for Exchange of Students for Technical Experiences |