- A-Comm Electronics
 - Englewood - Buy and sell electronic test equipment, featuring logic analyzers, digital and analogue scopes, function generators, volt meters, xy plotters, and chart recorders. - Advanced Probing Systems, Inc.
- Boulder - Probe needle production for probe card applications.
- Baker Instrument Company
- Fort Collins - Advanced test equipment for electric windings.
- Directed Energy, Inc.
- Fort Collins - High voltage and general purpose pulse generators, and modulators.
- QualMark Corporation
- Denver - Sells vibration and thermal chambers for quality control testing of electronic devices.
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