Boeing has long maintained a leading position in the commercial narrowbody aircraft market largely due to the success of its Boeing 737 family. The 737 is the second-best-selling aircraft family ever, with over 17,000 orders and 12,000 deliveries completed since the first 737-100 made its debut in 1968. However, the program was eventually caught up by Airbus’ popular narrowbody family – the Airbus A320 – which has since exceeded the 737 in both orders and deliveries.