Komatsu and its subsidiaries are engaged in the manufacture and market of various types of construction and mining equipment including excavating equipment, loading equipment, grading and roadbed preparation equipment, hauling equipment, tunneling machines, recycling equipment, other equipment, engines and components and casting products, as well as the sale of electronics including electronic materials, communications equipment, control equipment and temperature control equipment. Co. is also engaged in the manufacture and market of metal forging and stamping presses, sheet-metal machines, machine tools, industrial vehicle and defense systems.