| Acronym | Definition |
|---|
| RTTC➣Redstone Technical Test Center |
| RTTC➣Regional Technology Transfer Center (NASA) |
| RTTC➣Road to and Through College |
| RTTC➣Road Time Trials Council (bicycling; UK) |
| RTTC➣Rotten to the Core (gaming clan) |
| RTTC➣Releasing Time to Care (UK National Health Service) |
| RTTC➣Real Time Travel Connections (South Africa) |
| RTTC➣Rails-To-Trails Conservancy |
| RTTC➣Regional Technical Transfer Center |