Now Komatsu Ltd. is the world's second largest manufacturer of construction and mining equipment, after Caterpillar Inc. More than 70 percent of the company's revenues are generated from the sale of construction and mining equipment, including bulldozers, dump trucks, hydraulic excavators, mobile debris crushers, motor graders, rough-terrain cranes, tunnel-boring machines, and wheel loaders. Komatsu also has a major division devoted to the production of electronics. This business, responsible for about 7 percent of revenues, is involved in the production of electronic materials, including silicon wafers and polycrystalline silicon, both of which are used to make semiconductors; semiconductor manufacturing equipment; factory and office automation equipment; and local area network-related peripheral equipment. Komatsu divisions produce a wide variety of other products, including metal forging and stamping presses, sheet metal machinery, machine tools, forklift trucks, armored personnel carriers and other defense equipment, recycling plants, prefabricated office structures, and outdoor power equipment.