The Boeing 737 Family is a series of airliners released by Boeing. It is a twin-engined narrowbody, intended for short and medium distance flights. There are 10 variants in the 737 family, with capacity ranging from 85-215 passengers. The 737 Family is the most successful line of commercial airliners in history. As of late 2015 Boeing had about 8,800 737 orders will with about 4,200 unfilled orders.
737 Original Series
Boeing began design of the original 737 in May of 1964. Because it was already behind competitors like BAC, Douglas, and Fokker, Boeing used several elements of the 727 to speed up design. On December 28, 1967, Lufthansa received the first 737-100. On April 28, 1968, United received the first 737-200.
Boeing 737 Classic
Boeing 737 Next Generation
Boeing 737 MAX
737-700ER (Extended Range)
Boeing Business Jet
The 737 Orginal Series' competitors include the DC-9, BAC-111, and F28 Fellowship. Both the Original Series and Classic Series were much more popular then all three of them
The 737 Family's most notable competitor is Airbus's A320 Family. Direct competitors include the A320 and the 737-800, the A321 and the 737-900, and the A319 and the 737-700. By late 2015, Boeing had filled about 2,300 more orders then Airbus, but Airbus had about 900 more unfilled orders.