| Acronym | Definition |
|---|
| RDSI➣Red Digital de Servicios Integrados (Spanish: Integrated Services Digital Network) |
| RDSI➣Rurbanc Data Services Inc. (Defiance, OH) |
| RDSI➣Regional Disability Support Initiative |
| RDSI➣Research and Development Solutions, Inc. |
| RDSI➣Reynolds Depression Screening Inventory (psychology) |