- IBM Microelectronics
- iC Haus GmbH
- Ico Rally Corp.
- ICT, Inc
- I-Cube
- IGS Technologies, Inc.
- ILSI America
- IMP, Inc
- Indek Corporation
- Inductive Systems Europe
- Industrial Electronic Engineers (IEE)
- Infinite Technology Corp. (ITC)
- Information Storage Devices (ISD)
- Inmet Corp.
- Inradtek Corp.
- INSTEC Filters
- Integrated Circuit System (ICS)
- Integrated Device Technology (IDT)
- Integrated Microwave
- Integrated Optical Components Ltd. (IOC)
- Integrated Power Designs
- Integrated Silicon Solution, Inc. (ISSI)
- Integrated Silicon Systems (ISS)
- Integrated Technologies Express, Inc. (ITE)
- Integrated Telecom Technology (IGT)
- Intel
- Intellon Corp.
- Interconnect Devices, Inc. (IDI)
- InterFET
- International Crystal Mfg. Co., Inc. (ICM)
- International Electronic Research Corp. (IERC)
- International Electrotechnical Co., Ltd (IEC)
- International Meta Systems, Inc. (IMS)
- International Microcircuits, Inc. (IMI)
- International Power Devices, Inc.
- International Power Sources, Inc.
- International Rectifier (IR)
- International Resistive Co. (IRC)
- International Semiconductor, Inc.
- Interpoint
- Intronics, Inc.
- IQD Limited
- I.Q. Instruments CC
- Ironwood Electronics, Inc.
- Irvine Sensors Corp.
- Isotek
- Isotemp
- ITT Cannon
- ITT GTC
- ITT Semiconductors
- ITW Fastek
- ITW Jemco
- ITW Paktron
- IXYS Corp.
