- BEST., Inc.
 - Des Plaines - Soldering technologies training, rework, and repair company. - Bodine Electric Company
- Chicago - Fractional horsepower motors, gearmotors, and motion controls.
- Connomac Corp.
- La Grange - Manufacturing miniature electrical connectors.
- Dalec Electronics, Inc.
- Chicago - Supplier of digital instruments, power supplies, pressure transducers load cell, and everything for your industrial process needs.
- DLS Electronic Systems
- Wheeling - EMI/EMC testing and consulting lab.
- Electro-Stock
- West Chicago - PCB terminal blocks, fans, dip switches, cables and cable related equipment.
- Excell Electronics Corporation
- Elk Grove Village - From prototype to high-volume production.
- Gama, Inc.
- Woodstock - Switches and panels.
- Grayhill, Inc.
- La Grange - Manufacturer of rotary, pushbutton, DIP switches, keyboards and keypads and more.
- Jamo HiFi USA
- Northbrook - Offers innovative speaker styles and technology that redefine traditional speaker perceptions.
- Magnetic Shield Corporation
- Bensenville - Ranging from laboratory instruments to magnetically-shielded rooms.
- Meiji Corporation
- Elk Grove Village - Distributor of electric and electronic parts from Japan and Asia.
- Micro Lamps, Inc.
- Batavia - Miniature and sub-miniature halogens, LEDs, and neon lights.
- MMC Electronics America Inc.
- Rolling Meadows - Low-alpha solder, sputtering targets and SMD components including: thermistors, EMI filters, multilayer capacitors, and dual chip capacitors.
- National Electronics Distributors Association
- Chicago - Trade association with members that include some of the largest electronics distributors in the country.
- Nutron Computers and Electronics
- Lombard - Electronics and computer suplies from antennas to zener diodes.
- Ohmite
- Skokie - Resistors, rheostats, potentiometers, indicators, and more.
- PowerVolt Inc.
- Addison - Manufacturer of standard and custom transformers/magnetics. Designers and manufacturers of linear DC power supplies.
- Prostat Corporation
- Bensenville - Supplier of professional ESD auditing kits, instruments, and training.
- Qualitek International
- Addison - Manufacturer of soldering materials for the electronic assembly industries.
- Richardson Electronics, Ltd.@
- La Fox
- RoboProbe Technologies, Inc.
- Palatine - Robotic solutions for video inspection, remote viewing, measurement, and retrieval (FOSAR) in confined, remote, and hazardous areas.
- Vorne Industries
- Itasca - Industrial alphanumeric and numeric electronic displays, digital counters, timers, and remote readouts.
- Wenesco Inc.
- Chicago - Designs soldering equipment, wax pots, hot plates, and melting pots to electronic manufacturers.
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