The American Locomotive Company was incorporated in 1901, the result of the merger of the Schenectady Locomotive Engine Manufactory with seven small companies. In 1955 it became Alco Products, Inc. and was acquired in 1964 by the Worthington Corporation. In addition to steam and diesel engines and generators, the American Locomotive Company also manufactured high quality steel and military tanks, with unsuccessful ventures in automobile manufacture (1905-1913) and the production of nuclear energy (1954-1962). Collection contains advertising and publicity, correspondence, financial records (annual reports, ledgers, etc.), technical drawings and technical manuals, maps, news clippings, personnel records, photographs, sketches and drawings, and more.

American engineer, worked for American Locomotive Company (ALCo). Correspondence, technical reports and drawings, cost information, etc., most of which relates to ALCo and its production of diesel engines.