| Abbreviation | Definition |
|---|---|
| RTTC | Redstone Technical Test Center |
| RTTC | Refrigeration and Thermal Test Center |
| RTTC | Regional Touring Theatre Company |
| RTTC | Reinvent the Toilet Challenge |
| RTTC | Road Time Trials Council |
| RTTC | Round Trip Transaction Costs |
| RTTC | Rural Telementoring Training Center |
| RTTC | Rustic Trail Teardrop Campers |
| RTTD | Real Time Track Data |
| RTTD | Redundant to the Device |
| RTTD | Run Through The Desert |
| RTTE | Race To The Edge |
| RTTF | Race To The Finish |
| RTTF | Rat Tail Tip Fibroblasts |
| RTTF | Real Time Traffic Fraction |
| RTTF | Renewables and Transmission Task Force |
| RTTH | Road To The Horse |
| RTTH | Round The Table Hospitality |
| RTTH | Run to the Hills |
| RTTL | Radio Televisão Timor Leste |