The 1920s car REO was a popular American automobile brand founded by Ransom E. Olds in 1904. It was known for its reliable and affordable vehicles, which were produced until 1975. The company's name was derived from the initials of its founder's name. The REO was one of the most successful cars of the 1920s, with its production peaking in 1924. It was also the first car to be equipped with an automatic transmission.