Caterpillar is the world's largest manufacturer of heavy equipment. It markets its products in construction, mining, agriculture, and forestry. Recent acquisitions include Bucyrus. Competitors include Deere & Co., Komatsu, and Joy Mining. The company began in the late 1800s and saw growth throughout the 20th century through expansion globally and a focus on product quality and service. Today Caterpillar operates worldwide with over 300 machine models and offers financing, parts, and training services through its dealer network.