De Havilland Aircraft Company Limited is a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of London. Operations have since moved to Hatfield in Hertfordshire.

De Havilland Aircraft Company was responsible for the Moth biplane which revolutionized general aviation in the 1920s, the 1930s Fox Moth which was the first commercial transport aircraft able to operate without government subsidy, and the Comet which was the first passenger jet to enter service (beating the Avro Canada C.102 Jetliner by 13 days), along with other innovative and important aircraft.

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