The Airbus A300 became the world's first twin-engine wide-body airliner.
Airbus designed the A300 during the late 1960s for medium- to long-haul routes. Its wide fuselage allowed two passenger aisles and a more spacious cabin than narrow-body aircraft, while its two engines reduced operating costs compared with many earlier wide-body designs.
The prototype A300B1 made its first flight on 28 October 1972. The aircraft entered commercial service with Air France in 1974, establishing Airbus as a serious competitor in the international airliner market.
The A300 is sometimes confused with the smaller A310, which was derived from it. The A300's importance lies not only in its size but also in its twin-engine layout, which helped demonstrate that large wide-body aircraft could operate efficiently with two engines.