Caterpillar, Inc. engages in the business of manufacturing construction and mining equipment, off-highway diesel and natural gas engines, industrial gas turbines, and diesel-electric locomotives. The company is headquartered in Irving, Texas and currently employs 113,200 full-time employees. The firm operates through its three primary segments: Construction Industries, Resource Industries and Energy & Transportation. The company also provides financing and related services through its Financial Products segment. The Construction Industries segment is primarily responsible for supporting customers using machinery in infrastructure and building construction applications. The Resource Industries segment is primarily responsible for supporting customers using machinery in mining, heavy construction and quarry and aggregates. The Energy & Transportation segment is primarily responsible for supporting customers using reciprocating engines, turbines, diesel-electric locomotives, and related services across industries serving oil and gas, power generation, industrial and transportation applications.