Air T, Inc. operates wholly owned subsidiaries in three industry segments. The overnight air cargo segment consists of its Mountain Air Cargo, Inc. (MAC) and CSA Air, Inc. (CSA) subsidiaries, operates in the air express delivery services industry. The ground equipment sales segment consists of its Global Ground Support, LLC (GGS) subsidiary, manufactures and provides mobile deicers and other specialized equipment products to passenger and cargo airlines, airports, the military and industrial customers. The ground support services segment consists of its Global Aviation Services, LLC (GAS) subsidiary, provides ground support equipment maintenance and facilities maintenance services to domestic airlines and aviation service providers. The Company's overnight air cargo services are provided primarily to one customer, FedEx Corporation (FedEx).