SYSO
| Acronym | Definition |
|---|---|
| SYSO | Seattle Youth Symphony Orchestras (Washington) |
| SYSO | Seguridad y Salud Ocupacional (Spanish: Occupational Safety and Health; governmental division; various locations) |
| SYSO | Shelton Youth Soccer Organization (Connecticut) |
| SYSO | Skaneateles Youth Soccer Organization (New York) |
| SYSO | Swiss Youth Symphony Orchestra (Switzerland) |
| SYSO | Starkville Youth Soccer Organization (Starkville, MS) |