| Rank | Abbreviation | Meaning |
|---|
| ***** | TRTC | Tool Room Training Centre
| |
| ***** | TRTC | Translational Research Training in Cancer
| |
| **** | TRTC | Tropic Regions Test Center
| |
| **** | TRTC | Taipei Rapid Transit Corp
| |
| **** | TRTC | Top Referente Trauma Centra
| |
| **** | TRTC | Tripura Road Transport Corporation
| |
| *** | TRTC | Taipei Rapid Transit Corporation
| |
| *** | TRTC | The Recruitment Training Company
| |
| *** | TRTC | Tralee Regional Technical College
| |
| *** | TRTC | Two River Theater Company
| |
| *** | TRTC | Triangle Rails-To-Trails Conservancy
| |
| *** | TRTC | Terra Tech Corp (OTC Bulletin Board [OTCBB])
| |
| ** | TRTC | The Resource Training Center
| |
| ** | TRTC | Tarrant Regional Transportation Coalition
| |
| ** | TRTC | Timber Ridge Treatment Center
| |
| * | TRTC | Texas Radio Theatre Company
| |
| * | TRTC | Two River Theatre Company
| |
| * | TRTC | Top Referent Trauma Centrum
| |
| * | TRTC | Two River Theater Company's
| |
| * | TRTC | Trumbull Republican Town Committee
| |
| * | TRTC | Thunder River Theatre Company
| |
| * | TRTC | Transnistrian Radio and Television Center
| |