| Abbreviation | Definition |
|---|---|
| TNJ | TalkNJot.Com |
| TNK | This Negative Karma |
| TNK | TourNet Korea |
| TNK | Tyumen Oil Company |
| TNL | Tatung Netherlands |
| TNL | Technology Networks, Ltd. |
| TNM | Terra Nova Marine Company, Ltd. |
| TNM&O | Texas, New Mexico, and Oklahoma Coaches (now part of Greyhound) |
| TNMO | Texas, New Mexico & Oklahoma Coaches |
| TNMP | Texas- New Mexico Power Company |
| TNN | The NETWORK Network |
| TNO | The Neopian Orphanage |
| TNO | The Netherlands Organization |
| TNOC | The Network Operations Company |
| TNOC | The New Objective Collective |
| TNP | Teague, Nall, and Perkins, Inc. |
| TNP | The Natural Pharmacist |
| TNQ | Travancore National Quilon |
| TNR | Teledata Networking Resources, Incorporated |
| TNR | The New Relics |