| Abbreviation | Definition |
|---|---|
| RT | Ross Technologies |
| RTA | Regional Tourism Administration |
| RTAR | Ronnie's Towing And Recovery |
| RTAS | Robinson Tax and Accounting Services |
| RTBT | Rail Trail Bike Tours |
| RTC | Randolph Telephone Company |
| RTC | Resident Theatre Company |
| RTC | Resolution Trust Corporation |
| RTC | Reynolds Tubing Company |
| RTC | Ringgold Telephone Company |
| RTC | Rochester Telephone Company |
| RTC | Ros Taylor Company |
| RTCA | Radon Testing Corporation of America |
| RTCI | Research Triangle Commerce, Inc. |
| RTCI | Research Triangle Consultants, Inc. |
| RTCI | Rochester Telephone Company, Inc. |
| RTCI | Rural Telephone Company, Inc. |
| RTE | Radio Tahiti Enterprises |
| RTE | RT Engines |
| RTED | R T Engineering & Design, West Branch, Michigan |