| Abbreviation | Definition |
|---|---|
| RTIS | Real Time Interactive Simulation |
| RTIS | Real Train Information System |
| RTIS | Regional Traffic Information Services |
| RTIS | Remote Traffic Information System |
| RTIS | Rotating Tube Inspection System |
| RTJN | Random Tunnelling Junction Network |
| RTJS | Rebuilding Together Jersey Shore |
| RTK | Radio Television of Kosovo |
| RTK | Real Time Kinematics |
| RTK | Real Time Kinemtic |
| RTK | Remembering The Kanji |
| RTK | Revenue Ton Kilometer |
| RTKABA | Right to Keep and Bear Arms |
| RTKR | revision total knee replacement |
| RTKR | Right To Know Request |
| RTL | Radio and Television of Luxembourg |
| RTL | REACHING The Lost |
| RTL | Ready To Learn |
| RTL | Real Time Logic |
| RTL | Recyclable Transmission Line |