Benjamin Holt and Daniel Best experimented with various forms of steam tractors for use in farming. They did so separately, with separate companies. Both were pioneers with track-type tractors and gasoline-powered tractor engines. In 1925, The Holt and Best companies merge to form Caterpillar Tractor Co.
Headquartered in Peoria, Ill., Caterpillar Inc. is the world's largest manufacturer of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. It is a Fortune 100 company, ranked #1 in its industry, with more than $26 billion in assets.
A U.S. based global competitor, Caterpillar records half of its sales to overseas customers. Caterpillar has maintained its position as a leading U.S. exporter with U.S. exports of $5.2 billion in 1999.

• Marine diesel engine more than 250hp