| Abbreviation | Definition |
|---|---|
| HSM | High School Musical |
| HSM | Holy Smoke Ministry |
| HSM2 | High School Musical 2 |
| HSM3 | High School Musical 3 |
| HSMA | Headwaters School of Music the Arts |
| HSMA | Home School Music Association |
| HSMF | High Sierra Music Festival |
| HSO | Harrisburg Symphony Orchestra |
| HSO | Hartford Symphony Orchestra |
| HSO | Hawaii Symphony Orchestra |
| HSO | Hopkins Symphony Orchestra |
| HSO | Huntsville Symphony Orchestra |
| HSS | Hey Soul Sister |
| HSS | Hit Song Science |
| HSSB | Hannaford Street Silver Band |
| HSSB | High School Symphonic Band |
| HTM | Heelwork to Music |
| HTMA | Huntsville Traditional Music Association |
| HTMB | Hand To Man Band |
| HTMB | Hoover Tornado Marching Band |