Mitsubishi Heavy Industries (MHI) is a company that manufactures and sells heavy machinery. It operates through four segments: Energy Systems, Plants and Infrastructure Systems, Aircraft, Defense, and Space, and Logistics, Thermal and Drive Systems. The Energy Systems segment produces gas and steam power systems, nuclear power plant equipment, wind power generators, aero engines, compressors, and marine machinery. The Logistics, Thermal and Drive Systems segment specializes in material handling equipment, turbochargers, engines, air-conditioning and refrigeration systems, etc. The Aircraft, Defense, and Space segment provides commercial aircraft, defense aircraft, missile systems, naval ships, special vehicles, maritime systems, and space systems. The Plants and Infrastructure Systems segment offers commercial ships, environmental systems, metals machinery, machine tools, and machinery systems.