| Abbreviation | Definition |
|---|---|
| HSI | Harsh Squirrel Interaction |
| HSK | Hanyu Shuiping Kaoshi |
| HSLC | Health Sciences Learning Center |
| HSLC | Holifield Science Learning Center |
| HSLC | Human Services Learning Center |
| HSLI | Hasbro Summer Learning Initiative |
| HSPA | High School Proficiency Assessment |
| HSPE | Higher Still Physical Education |
| HSPT | High School Placement Test |
| HSSE | Humanities and Social Studies Education |
| HSSE | Humanities Social Science and Education |
| HSSE | Humanities Social Science Education |
| HSSL | High School for Service Learning |
| HST | High School Test |
| HSTE | Hawaii Society for Technology in Education |
| HSTE | Health Science Technology Education |
| HSTE | Healthcare Science Teacher Education |
| HSTE | HealthCare Science Technology Education |
| HSTE | High School Teacher of Excellence |
| HSTW | High School That Works |