| Acronym | Definition |
|---|
| RBSI➣Royal Bank of Scotland International |
| RBSI➣Ralph Bunche Summer Institute (est. 1986; American Political Science Association) |
| RBSI➣Royal Bank of Scotland Insurance (UK) |
| RBSI➣Regina Business Systems, Inc. (Canada) |
| RBSI➣Retail Business Survey Index (Korea Chamber of Commerce; South Korea) |
| RBSI➣Regence BlueShield of Idaho (health insurance) |