The Cummins Engine Company was founded in 1919 by namesake Clessie Cummins. The Columbus, Indiana company focused on developing the engine invented 20 years earlier by Rudolf Diesel, but in spite of several well publicized endurance trials, it was not until 1933 that they introduced the successful Model H, used in small railroad switchers. In the post WWII U.S. road building boom Cummins, with their N Series engines, became the leader in heavy duty truck engines, from 1952 to 1959 they had more than half the market. In the 1960s the company opened an assembly plant in Shotts, Scotland. By 2014 they had operations in 197 countries and territories.
Cummins also services engines and related equipment, including fuel systems, controls, air handling, filtration, emission control and electrical power generation systems. Headquartered in Columbus, Indiana, United States, Cummins sells in approximately 190 countries and territories through a network of more than 600 company-owned and independent distributors and approximately 6,000 dealers. Cummins reported net income of $1.64 billion on sales of $17.3 billion in 2012.