General Motors is one of the largest vehicle-producing companies in the world. It was founded in Michigan in 1908 by William C Durant. Beginning with Buick, it acquired many other brands including Oldsmobile, Cadillac, Pontiac, Chevrolet, SAAB, Opel and Vauxhall. General Motors also built aircraft and supplied engines for railcars and submarines. From 1949 to 1961, General Motors held a show called “Motorama” to publicise their range of cars. They also built some experimental “Firebird” vehicles which were displayed at these shows. 1954 also saw the introduction of the iconic GMC PD-4501 Scenicruiser which was built for Greyhound Lines Inc. General Motors now manufactures in 15 countries worldwide with sales in 2016 reaching 10 million vehicles annually.