The Four Wheel Drive Auto Company, more often known as Four Wheel Drive (FWD), was a pioneering American company that developed and produced all-wheel drive vehicles. It was founded in 1909 in Clintonville, Wisconsin, as the Badger Four-Wheel Drive Auto Company by Otto Zachow and William Besserdich. The first production facility was built in 1911 and was designed by architect Wallace W. DeLong of Appleton, Wisconsin.

Harold Arminius Miller, commonly called Harry, was an American race car designer and builder who was most active in the 1920s and 1930s. Griffith Borgeson called him "the greatest creative figure in the history of the American racing car". Cars built by Miller won the Indianapolis 500 nine times, and other cars using his engines won three more. Millers accounted for 83% of the Indy 500 fields between 1923 and 1928.