| Acronym | Definition |
|---|
| RTCA | Rivers Trails and Conservation Assistance (National Park Service) |
| RTCA | Radio Technical Commission for Aeronautics |
| RTCA | Rio Tinto Coal Australia |
| RTCA | Requirements and Technical Concepts for Aviation |
| RTCA | Rural Training Council of Australia |
| RTCA | Real Time Casualty Assessment |
| RTCA | Radon Testing Corporation of America |
| RTCA | Rat Terrier Club of America |
| RTCA | Rail Technology Cluster Austria |
| RTCA | Radio-Television Correspondents Association |
| RTCA | Round Table Coordinating Assembly |
| RTCA | Race Track Chaplaincy of America, Inc. |