The Museum's typewriter collection includes examples by Barlock, Remington, Oliver, the Northern Typewriter Company, and many others. The Hammond No. 12 Multiplex, developed in the 1890s, prints with the hammers striking the paper from behind. The Blickensderfer, first introduced at the Columbia Exposition at the Chicago World's Fair in 1893, has a changeable type wheel, allowing the use of different fonts or languages. The variety and ingenuity of these early typewriters is well represented by over fifty typewriters in the Museum's collection.