| RTCA | Race Track Chaplaincy of America
| Others |
| RTCA | Radio and Television Correspondents Association
| Others |
| RTCA | Radio Technical Commission for Aeronautics
| Others |
| RTCA | Radio Technical Commission of Aeronautics
| Others |
| RTCA | Radon Testing Corporation of America
| Others |
| RTCA | Real Time Casualty Assessment
| Others |
| RTCA | Real Time Cell Analyzer
| Others |
| RTCA | Real-Time Cell Analysis
| Others |
| RTCA | Rear Toe Control Arms
| Others |
| RTCA | Reid Temple Christian Academy
| Others |
| RTCA | Requirements and Technical Concepts for Aviation
| Others |
| RTCA | Reston Town Center Association
| Others |
| RTCA | Rio Tinto Coal Australia
| Others |
| RTCA | Rivers Trails and Conservation Assistance
| Others |
| RTCA | Robert Toombs Christian Academy
| Others |
| RTCA | Round Table Coordinating Assembly
| Others |