- Advanced Testing Technologies, Inc. (ATTI)
 - Manufacturer and supplier of automated test equipment.  Aerotech World Trade Ltd
- Technical distributor for ARINC 429, MIL-STD-1553, and 3910 databus interfaces.- Apollotek Ltd
- Designs and manufactures airborne and ground telemetry, data recording, and analysis instrumentation.
- Avionica, Inc.
- Providing solutions for interfacing, testing and diagnosing database systems.
- Avionics International Supply, Inc.
- New and used test equipment for avionics repair stations including TIC, IFR and more.
- Comptek Amherst Systems Inc.
- Manufactures simulation and measurement products for use in testing avionics systems and training system operators.
- EDMO Distributors Inc
- Wholesale distributor of aircraft avionics, new and used test equipment, aviation toys and gifts, installation supplies, pilot supplies, and pilot shop accessories.
- Instrumentation Specialties, Inc. (ISI)
- Source for instrumentation, design, engineering, manufacturing and fabrication, assembly, and pretest services for the aerospace, commercial, and industrial markets.
- North Atlantic Instruments
- Avionics test and measurement instruments. Synchro/Resolver/LVDT instrumentation, VMEbus, and synchro amplifiers.
- Pentar Avionics Corporation
- Developer of PC-based automated test equipment for avionics.
- Schwien Manometers
- Manufacturer of primary pressure standards, range of calibration services for secondary pressure standards.
- Tel-Instrument Electronics Corp.
- Produces equipment for commercial and military users including units that test in antenna-to-antenna and direct-connect modes.
- Universal Synaptics Corporation
- Makers of the multi-channel, neural network "No Fault Found" intermittence analyzer. Resolves major aviation safety problem for NTSB, FAA, and airlines.
- YED Avionics Databus Specialists
- Aerospace electronics engineering firm providing avionics test & diagnostics equipment for ARINC 429 data systems on PC and hand held portable equipment platforms.
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