The Boeing 737 Next Generation (B737 NG) is a series of commercial jetliners designed for short to medium-haul flights. Introduced in the late 1990s, it includes models such as the B737-600, B737-700, B737-800, and B737-900. The aircraft features advanced aerodynamics, improved engines, and updated avionics, enhancing fuel efficiency and passenger comfort. The B737 NG can typically seat between 110 to 210 passengers, depending on the configuration. It has a range of approximately 3,000 to 3,500 nautical miles, making it suitable for various domestic and international routes. The B737 NG has become one of the best-selling aircraft in aviation history.