The Boeing 737 Next Generation, commonly abbreviated as 737NG, or 737 Next Gen, is a twin-engine narrow-body aircraft produced by Boeing Commercial Airplanes. Launched in 1993 as the third generation derivative of the Boeing 737, it has been produced since 1997 and is an upgrade of the 737 Classic (-300/-400/-500) series.

It has a redesigned wing with a larger area, a wider wingspan, greater fuel capacity, and higher maximum takeoff weights (MTOW) and longer range. It has CFM International CFM56-7 series engines, a glass cockpit, and upgraded and redesigned interior configurations. The series includes four variants, the -600/-700/-800/-900, seating between 108 and 215 passengers. The 737NG's primary competition is the Airbus A320 family. As of December 2023, a total of 7,124 737NG aircraft had been ordered, of which 7,108 had been delivered, with remaining orders for two -800, and 14 -800A variants. The most-ordered variant was the 737-800, with 4,991 commercial, 191 military, and 23 corporate, or a total of 5,205 aircraft. Boeing stopped assembling commercial 737NGs in 2019 and made the final deliveries in January 2020. The 737NG is superseded by the fourth generation 737 MAX, introduced in 2017.

Controls:
AG1: Navigation lights
AG2: Beacon lights
AG3: Strobe lights
AG4: Reverse thrust
AG5: Landing lights
AG8: Nose gear lights
VTOL: Flaps
Trim: Adjust trim

Credits to @HarryBRZ for the ANA text and logo