Caterpillar Inc. manufactures and sells construction and mining equipment, diesel and natural gas engines, and industrial gas turbines worldwide. Its Machinery business engages in the design, manufacture, marketing, and sale of construction, mining, and forestry machinery, such as track and wheel tractors, track and wheel loaders, pipelayers, motor graders, wheel tractor-scrapers, track and wheel excavators, backhoe loaders, log skidders, log loaders, off-highway trucks, articulated trucks, paving products, skid steer loaders, underground mining equipment, tunnel boring equipment, and related parts. This business also involves in the design, manufacture, remanufacture, maintenance, and service of rail-related products, as well as offers logistics services.