Cummins makes diesel and natural gas powered engines for the heavy and mid-duty truck, RV, automotive, and industrial markets, along with marine, rail, mining, and construction. In addition to its flagship Engine segment, other business segments include Components (filtration products and fuel systems), Power Systems (vehicle and residential generators), and Distribution (product distributors and servicing). Major customers include OEMs Chrysler, Daimler, Ford, Komatsu, PACCAR, and Volvo. About 45% of Cummins' sales are from outside the US.