BSSO
| Acronym | Definition |
|---|---|
| BSSO | British Services Security Organisation (UK) |
| BSSO | British Scooter Sport Organisation (UK) |
| BSSO | Building Science Specialist of Ontario (Ontario Building Envelope Council; Canada) |
| BSSO | Big Sounds Society Orchestra (Japan) |
| BSSO | Birmingham Schools Symphony Orchestra (Birmingham, England, UK) |
| BSSO | Bilateral Sagittal Split Osteotomy |