| Acronym | Definition |
|---|
| NYSO➣New York Street Outlaws (street racing group) |
| NYSO➣New York Special Olympics |
| NYSO➣Northshore Youth Symphony Orchestra (Topsfield, MA) |
| NYSO➣New York State-Ontario (various organization chapters) |
| NYSO➣New York Stage Originals |
| NYSO➣National Youth Symphony Orchestra (various locations) |
| NYSO➣Nottingham Youth String Orchestra (Nottingham, England) |