Boeing is a major aerospace and defense firm. The firm operates in four segments, commercial airplanes, defense, space & security, global services, and Boeing capital. Boeing's commercial airplanes segment competes with Airbus in the production of aircraft ranging from 130 seats upwards. Boeing's defense, space & security segment competes with Lockheed, Northrop, and several other firms to create military aircraft and weaponry. Boeing global services provides aftermarket support to airlines.