| Abbreviation | Definition |
|---|---|
| JSSI | Jet Support and Service, Inc. |
| JSSI | Jet Support Services Inc |
| JSSL | JSW Severfield Structures Ltd |
| JSTL | Jeevan Scientific Technology Ltd |
| JSVVP | Joseph Strickland Vital Vision Productions |
| JSW | Jacob Saul Watkins |
| JSW | Jacob Spring Works |
| JT | Japan Tobacco |
| JT | Jay Travel |
| JT | Jersey Telecom |
| JTA | Taylor & Associates Ltd. |
| JTC | Jurong Town Corporation |
| JTCL | Jabalpur Transmission Company Limited |
| JTCL | Jagannath Textile Company Ltd |
| JTD | John Taylor Distributors |
| JTEC | Japanese Technology Evaluation Center |
| JTI | Japan Tobacco Inc |
| JTI | Transportation Inc |
| JTM | Just the Message |
| JTN | Japanese Transcontinental Network |