HEICO is a company engaged in the design, manufacture, and sale of aerospace, defense, and electronics-related products. It operates through two segments: Flight Support Group (FSG) and Electronic Technologies Group (ETG). The FSG segment offers design, manufacturing, repair, and overhaul of jet engine and aircraft component replacement parts, avionics, and instruments. The ETG segment specializes in the design and manufacturing of various types of electronic, data and microwave, and electro-optical products, including infrared simulation and test equipment, laser rangefinder receivers, electrical and backup power supplies, power conversion products, underwater locator beacons, emergency locator transmission beacons, flight deck annunciators, and other products. The company caters to avionics, defense, and aerospace markets.