

Models expanded in the 20th century, leading to the widespread introduction of the contemporary recognizable form of full size buses from the 1950s. They then purchased the balance of the shares in 1943 to form the GM Truck Coach Division. General Motors purchased a majority stake in 1925 and changed its name to the Yellow Truck Coach Manufacturing Company. The Yellow Coach Manufacturing Company which rapidly became a major manufacturer of buses was founded in Chicago in 1923 by John D. The first internal combustion engine buses were developed along with the automobile. In parallel to the development of the bus was the invention of the electric trolleybus, typically fed through trolley poles by overhead wires, which actually preceded, and in many urban areas outnumbered, the conventional engine powered bus.
