The members of the Next-Generation 737 family -- the 737-600/-700/-800/-900ER models -- continue the 737's popularity and reliability in commercial jetliner transport. The Next-Generation family has won orders for more than 6,300 airplanes, while the combined 737 family has surpassed 10,700 orders. Boeing has delivered more than 7,500 737s (of those more than 4,400 are Next-Generation 737s) through April 2013.