Since producing its first harvester in 1885 under the Best brand name, Caterpillar has been a leader in the construction and earthmoving industries, and most recently, has become one of the top five in agriculture. While providing limited coverage of Cat construction and mining machinery, this new photo-history provides a concise overview that focuses on the maker's agricultural line, including early steam and diesel tractors and significant postwar machinery. Photos are both archival and modern.