| Abbreviation | Definition |
|---|---|
| JMAPI | Java management API |
| JMPC | Jampro Medium Power type C antenna |
| JMPC-HD | Jampro Medium Power type C antenna - High Definition |
| JND | Just Noticable Difference |
| JOT | Join On To |
| JQE | Journal of Quantum Electronics |
| JQP | Josephson Quasi Particle |
| JREC | James Reid Electrical Controls |
| JREC | Jump River Electric Cooperative |
| JSAPI | Java security Api ( Application program interface) |
| JSAPI | Java server Api |
| JSECST | Joint Services Electronic Combat System Tester |
| JSECST | Joint Services Electronic Combat Systems Tester |
| JSNM | Japan Society of New Metals |
| JSTS | Journal of Semiconductor Technology and Science |
| JT | Jahn-Teller |
| JT | Joint Tape |
| JTAG | Joint Test Action Group |
| JTEC | Journal of Telecommunication Electronic and Computer |
| JVR | Japanese Voltage Reducer |