KW (Dampf-Kraft-Wagen, English: steam-driven car) is a German car and motorcycle marque. The company and brand is one of the ancestor companies of the modern day Audi company as one of the four companies that formed Auto-Union.
In 1916, Danish engineer Jørgen Skafte Rasmussen founded a factory in Zschopau, Saxony, Germany, to produce steam fittings. That year he attempted to produce a steam-driven car, called the DKW. Although unsuccessful, he made a two-stroke toy engine in 1919, called Des Knaben Wunsch – "the boy's wish". He put a slightly modified version of this engine into a motorcycle and called it Das Kleine Wunder – "the little wonder" the initials from this becoming the DKW brand: by the late 1920s, DKW was the world's largest motorcycle manufacturer.