The Lockheed L-1011 Tristar, commonly referred to as just L-1011 (pronounced "ell-ten-eleven"), was the third widebody passenger jet airliner to enter operation, following the Boeing 747 and the McDonnell Douglas DC-10. Like the DC-10, the TriStar is a three-engine jet airliner. Between 1968 and 1984, Lockheed manufactured a total of 250 TriStars. After production ended, Lockheed withdrew from commercial aircraft business due to its below-target sales.