| Abbreviation | Definition |
|---|---|
| IVQ | Intelligent Vehicle Quarterly |
| IVRU | Interactive Voice Response Unit |
| I-VTEC | Intelligent Variable-Valve Timing Electronic Control |
| IW | Instantaneous Wavelength |
| IW | Insulated Wire |
| IWE | Intelligent World of Electronics |
| IWH | Indexing Wafer Handler |
| IZE | Initiating Zone Expander |
| J | Jitter |
| JACK | Jack Audio Connection Kit |
| JAE | Japan Aviation Electronics |
| JAG | Junction At Gate |
| JBC | Junction Box, Current relay |
| JBCG | Junction Box, Current Relay, Ground fault protection |
| JBCP | Jampro Class B antenna, Circularly Polarized |
| JBCV | Junction Box, Current Relay, over-Voltage protection |
| JBT | Journal of Battlefield Technology |
| JC | Join Cable |
| JCAPI | Java card Api |
| JCE | Jackie Cooper Electronics |