The Boeing 737 Next Generation (NG) is a series of commercial jetliners that includes the 737-600, 737-700, 737-800, and 737-900 models. Introduced in the late 1990s, the NG series features improved fuel efficiency, advanced aerodynamics, and modern cockpit technology, making it a popular choice for airlines worldwide. The B737 NG can accommodate between 110 to 210 passengers, depending on the model and seating configuration. It is known for its reliability and versatility, serving various routes from short-haul to medium-haul flights. The aircraft has become a staple in many airline fleets, contributing significantly to global air travel.