RSSO
| Acronym | Definition |
|---|---|
| RSSO | Radiation Safety Staff Officer |
| RSSO | Russian State Symphony Orchestra |
| RSSO | Ruchika Social Service Organization (India) |
| RSSO | Rabbinical School Student Organization |
| RSSO | Ravenna Second String Orchestra |
| RSSO | Rettungs Schwimm Sport Organisation (German: Rescue Swimming Sports Organization) |
| RSSO | Registered Stock and Securities Ordinance (Sri Lanka) |