| Abbreviation | Definition |
|---|---|
| ISTP | Individually Shielded Twisted Pair |
| ISU | Intelligent Switch Unit |
| ITA | Interface Test Adapter |
| ITAP | Integrated Test Analysis Processor |
| ITC | Instrumentation Tray Cable |
| ITD | Initial Time Delay |
| ITOS | Integrated Test and Operations System |
| IVDK | IGLOO Video Demo Kit |
| IVP | Improved Version Podbot |
| IVP | Interactive Voice Processing |
| IWRC | Independent Wire Rope Core |
| IZE | Image Zone Express (HP) |
| JACK | Jack Audio Connection Kit |
| JAM | Joes Abstract Machine |
| JESSI | Joint European Submicron Silicon Initiative |
| JFC | Japanese Flash Card |
| JFET | Junction Field Effect Transistor |
| JLA | Jla Enterprises Technologies Integration |
| JLCC | J-Leaded Chip Carrier |
| JOHNNIAC | John von Neumann Numerical Integrator and Automatic Computer |