CSX Corporation is a transportation company. The Company provides rail-based freight transportation services, including traditional rail service and transport of intermodal containers and trailers, as well as other transportation services, such as rail-to-truck transfers and bulk commodity operations. It categorizes its products into primary lines of business such as merchandise, intermodal, coal and trucking. Its intermodal business links customers to railroads through trucks and terminals. Its merchandise business consists of shipments in markets, such as agricultural and food products, automotive, forest products, metals and equipment, and fertilizers. It transports domestic coal, coke and iron ore to electricity-generating power plants, steel manufacturers and industrial plants, as well as export coal to deep-water port facilities. Its principal operating subsidiary, CSX Transportation, Inc., provides an important link to the transportation supply chain through its route-mile rail.