HYSO
| Acronym | Definition |
|---|---|
| HYSO | Hygienic Solutions (doorknob sanitizer) |
| HYSO | Hamilton Youth Steel Orchestra (est. 2004; Hamilton, Ontario, Canada) |
| HYSO | Halton Youth Symphony Orchestra (est. 1975; Oakville, Ontario, Canada) |
| HYSO | Harrisburg Youth Symphony Orchestra (Harrisburg, PA) |