| Abbreviation | Definition |
|---|---|
| RTTS | Return to the Source |
| RTTS | Road to the Show |
| RTTS | Run to the Sun |
| RTTT | Read The Things Tui |
| RTTT | Real Time Tuning Tool |
| RTTT | Road Transport and Traffic Telematics |
| RTTT | Rolling Thunder The Taiko |
| RTTTON | RTTT on |
| RTTTON | RTTT – on |
| RTTV | Rheinhessischer Tisch Tennis Verband |
| RTU | R+gas Tehnisk universitte |
| RTU | R+gas Tehnisks universittes |
| RTU | Reaching the Unreached |
| RTU | Real time updates |
| RTU | Regional Training Unit |
| RTU | Remote Telemetry Units |
| RTU | Remote Terminal Units |
| RTU | Return terminal unit |
| RTU | Revolutionary Technologies United |
| RTU | Rigas Tehniska universitate |