| Abbreviation | Definition |
|---|---|
| HSSP | Haryana School Shiksha Pariuojna |
| HSSP | High School Summer Program |
| HSSR | High School Summer Retreat |
| HSSS | High School Senior Stabilization |
| HSSS | High School Student Services |
| HSSS | Howe Sound Secondary School |
| HSSSE | High School Survey of Student Engagement |
| HSST | High School of Science and Technology |
| HSTD | Huddersfield School Of Theatre Dance |
| HSTE | Higher School of Technology and Energy |
| HSTII | High School Tiered Interventions Initiative |
| HSTP | High School Transformation Project |
| HSTP | High Schools Transformation Project |
| HSTS | High School Transcript Studies |
| HSTS | High School Transcript Study |
| HSTW | High Schools That Work |
| HSVC | High School Video Contest |
| HSVC | High School Volunteer Council |
| HSVP | High School Volunteer Program |
| HSW | High School West |