Boeing is the global aerospace leader, and is the world's largest manufacturer of civilian and military aircraft. In addition, Boeing designs and manufactures rotorcraft, electronic and defense systems, missiles, satellites, launchers, and advanced information and communications systems. As a major service provider to NASA, Boeing operates the space shuttle and international space station; also provides numerous military and civilian airline support services to its customers in more than and 90 countries around the world. As far as sales are concerned, Boeing is one of the largest exporters in the United states.