The F-16 Fighting Falcon was manufactured from General Dynamics from 1974 to 1993, Lockheed Corporation from 1993 to 1995, and since 1995, it has been manufactured by Lockheed Martin. The United States Air Force (USAF), four of its NATO partners, and the Pakistan Air Force (PAF), a major non-NATO US ally, are the primary operators of the aircraft. With the evolution of sales under Foreign Military Sales (FMS) contracts, many other air forces have also acquired and use F-16s.