[ Communication systems, namely, radio receivers, radio transmitters, radio multiplexers, audio and tactical multiplexer switches and digital circuit switches and associated peripheral equipment, namely, digital group combiners and ethernet combiners; radio telephones; multi-channel line-of-sight and electronic counter-countermeasures radios and ancillary equipment, namely, antennas, masts and cables; secure satellite communications radios; ] test sets, used to test and measure voltage, current, power, phase and other electrical/electronic parameters during the manufacture of electronic equipment and the subsequent operation, maintenance and repair of said equipment; airborne satellite communications antennas; [ aeronautical television antennas; spacecraft transmitters and transponders; flight termination receivers; ] miniaturized electronic devices utilizing active and passive electronic components, namely, hybrid micro-circuits; [ electronic power supply units to generate and supply electrical power of the required form to dependant electrical/electronic apparatus; power conversion units, namely, power conversion units for use to convert voltage levels to required needs; ] aircraft navigation equipment, namely, global positioning systems, radar, and sensors for the determination of positions and distances; instruments used on an aircraft flight deck for monitoring, calculating, and displaying aircraft engine status and parameters; visual display panel units to monitor and display electrical, electronic and mechanical systems parameters, in graphic and/or alphanumeric form, utilizing cathode ray tube, incandescent, fibre optic, and solid state (LCD and LED) forms of illumination; custom panels and display systems comprised of a keyboard, display assemblies, a bracket LED and LCD, circuit card assembly, rotary controls, encoders, toggle switches and high performance optical filters; global positioning system products, namely, global positioning system sensors, global positioning system units for ground stations, airborne use and related software, global positioning system receivers for original equipment manufacturers