| Acronym | Definition |
|---|
| BYSO➣Bring Your Significant Other |
| BYSO➣Boston Youth Symphony Orchestras |
| BYSO➣Bellevue Youth Symphony Orchestra (Bellevue, Washington) |
| BYSO➣Berkshire Youth Symphony Orchestra (UK) |
| BYSO➣Bastrop Youth Soccer Organization (Bastrop, LA) |
| BYSO➣Bastrop Youth Soccer Organization (Bastrop, TX) |
| BYSO➣Brant Youth Symphony Orchestra (Ontario, Canada) |
| BYSO➣Binghamton Youth Symphony Orchestra (Binghamton, New York) |
| BYSO➣Bay Youth Symphony Orchestra (Norfolk, VA) |
| BYSO➣Bilkent Youth Symphony Orchestra (Turkey) |
| BYSO➣Bromley Youth Symphony Orchestra (UK) |
| BYSO➣Bais Yisroel Shabbos Observer |
| BYSO➣Brush Your Shoulders Off |