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| International Connector | International Controls & Measurements (ICM) | International Cord Sets |
| International Data Sciences | International Fiber Systems(IFS) | International Parallel Machines |
| International Power DC Power Supplies | International Power Technologies | International Rectifier |
| International Rectifier/Advanced Analog | International Semiconductor | International Space Optics |
| International Wire Bare Wire Div. | Intersil | Intersil/Elantec Semiconductor |
| Interstate Batteries | Interstate Wire | Interswitch |
| Intertape Polymer Group | Intervox (Also see International Components (ICC)) | Interworld Electronics & Computer Inds. |
| Intrade (Also see Viola) | Intronics | Invensys Building Systems |
| Iomega | Ipex | IPI/MIL Connector Division |
| IRC (International Resistive Co.) | Ironwood Electronics | Iscar |
| ISD | Iskra USA | Isocom Components 2004 |
| Isodyne | Isotec | Isowave |
| ISSC | IST/Datem | iTech |
| Ithaca/TransAct Technologies | ITT Cannon Connectors | ITT Cannon RF Prds |
| ITT Engineered Valves | ITT Power Solutions | ITT Switches |
| ITTI | ITW Ark-Les Connector Bus. Unit | ITW Chemtronics |
| ITW Devcon | ITW Dynatec | ITW Paktron |
| ITW Pancon | ITW Ramset/Red Head | ITW Shakeproof |
| ITW Switches (Licon/Chicago Switch/UID-RCL) | IXYS | J&J Electronics Inc. |
| J&M Products | J-Tech | J.S.T. |
| J.W. Miller Magnetics/Bourns | Ja-Bar Silicone | Jacques Ebert and Assoc. |
| JAE Electronics | JAI Inc. | James Monroe Wire & Cable |
| Jamicon |
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