The Boeing 737 Next Generation (NG) is a series of commercial jetliners developed by Boeing to enhance the original Boeing 737 design. Introduced in the late 1990s, the NG family includes models such as the 737-600, 737-700, 737-800, and 737-900, offering improved fuel efficiency, range, and passenger capacity. The 737 NG features advanced wing designs, upgraded engines, and a modernized cockpit, making it a popular choice for airlines worldwide. With a seating capacity ranging from 110 to 220 passengers, it is widely used for short to medium-haul flights, contributing significantly to global air travel.