| RCAI | Railroad Collectors Association Incorporated 
| Others |
| RCAI | Railroadiana Collectors Association Incorporated
| Others |
| RCAI | Remote Controlled Analog Interface
| Others |
| RCAI | Research Center for Allergy and Immunology
| Others |
| RCAI | Research Center for Artificial Intelligence
| Others |
| RCAI | Restorative Care of America Inc
| Others |
| RCAI | Revealed Comparative Advantage Indexes
| Others |
| RCAI | Root Certifying Authority of India
| Others |
| RCAI | Rotary Club Amsterdam International
| Others |