Cummins Inc is a diesel engine manufacturer. The Company designs, manufactures, distributes and services diesel and natural gas engines and engine-related component products, including filtration, aftertreatment, turbochargers, fuel systems, controls systems, air handling systems and electric power generation systems. It sells its products to original equipment manufacturers, distributors and other customers. It operates in four segments: Engine, Distribution, Components and Power Generation. The Engine segment produces engines and parts for sale to customers in on-highway and various industrial markets. Its engines are used in trucks of all sizes, buses and recreational vehicles, as well as in various industrial applications, including construction, mining, agriculture, marine, oil and gas, rail and military equipment. The Distribution segment includes wholly-owned and partially-owned distributorships engaged in wholesaling engines, generator sets and service parts, as well as performing service and repair activities on its products and maintaining relationships with various OEMs throughout the world. The Components segment sells filtration products, aftertreatment systems, turbochargers and fuel systems. The Power Generation segment is an integrated provider of power systems, which sells engines, generator sets and alternators. The customers of its heavy- and medium-duty truck engines include truck manufacturers such as PACCAR Inc. (PACCAR), Daimler Trucks North America, Navistar International Corporation (Navistar), Ford Motor Company, MAN Latin America and Volvo. It sells its industrial engines to manufacturers of construction, agricultural and marine equipment, including Komatsu, Belaz, Hyundai, Hitachi and JLG. The customers of its light-duty on-highway engines are Chrysler and manufacturers of RVs. Customers of Components segment include its Engine and Distribution segments, truck manufacturers and other OEMs, many of which are also customers of its Engine segment, such as PACCAR, Daimler, Navistar, Volvo, Scania, Fiat, Komatsu, Ford and other manufacturers that use its components in their product platforms. In the markets served by its Engine segment, it competes with independent engine manufacturers as well as OEMs who manufacture engines for their own products. Its competitors in North America are Navistar, Daimler Trucks North America, Caterpillar Inc. (CAT), Volvo Powertrain, Ford Motor Company and Hino Power. Its competitors in international markets vary from country to country, with local manufacturers generally predominant in each geographic market. Other engine manufacturers in international markets include Weichai Power Co. Ltd., MAN Nutzfahrzeuge AG (MAN), Fiat Power Systems, GuangxiYuchai Group, GE Jenbacher, Tognum AG, CAT, Volvo, Yanmar Co., Ltd. and Deutz AG. Its Components segment competes with other manufacturers of aftertreatment systems, filtration, turbochargers and fuel systems. Its competitors in these markets include Robert Bosch GmbH, Donaldson Company, Inc., Clarcor Inc., Mann+Hummel Group, Honeywell International, Borg-Warner, Tenneco Inc., Eberspacher Holding GmbH & Co. KG and Denso Corporation. Power Generation competes with a variety of engine manufacturers and generator set assemblers across the world. Its competitors are CAT, Tognum (MTU) and Kohler/SDMO (Kohler Group), but it also competes with GE Jenbacher, FG Wilson (CAT group), Generac, Mitsubishi (MHI) and numerous regional generator set assemblers. Its alternators business competes with Emerson Electric Co., Marathon Electric and Meccalte, among others.at use components in their product platforms.