Air T, Inc. operates wholly owned subsidiaries in three industry segments: the overnight air cargo segment, the ground equipment sales segment and the ground support services segment. The overnight air cargo segment comprises Mountain Air Cargo, Inc. (MAC) and CSA Air, Inc. (CSA) subsidiaries, operates in the air express delivery services industry. The ground equipment sales segment comprises 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, comprises its Global Aviation Services, LLC (GAS) subsidiary, provides ground support equipment maintenance and facilities maintenance services to domestic airlines and aviation service providers. MAC and CSA's revenues are derived principally pursuant to dry-lease service contracts with FedEx Corporation.