| JDP | Joint Development Program |
| JEDEC | Joint Electron Device Engineering Council |
| JEIDA | Japanese Electronic Industries Development Association |
| JESSI | Joint European Submicron Silicon |
| Jg | Leakage Current |
| JIC | Joint Industrial Council |
| JIT | Just-in-time |
| JJT | Josephson Junction Transistor |
| Jsilc | Current Measured At Vsilc |
| JSNM | Japan Society Of New Metals |
| JVD | Jet Vapor Deposition |