The McDonnell Douglas DC-10 is a three-engine widebody jet airliner manufactured by McDonnell Douglas. The DC-10 has range for medium- to long-haul flights, capable of carrying a maximum 380 passengers. Its most distinguishing feature is the two turbofan engines mounted on underwing pylons and a third engine at the base of the vertical stabilizer. The model was a successor to McDonnell Douglas's DC-8 for long-range operations, and competed in the same markets as the Lockheed L-1011 Tristar, which has a similar layout to the DC-10.
Production of the DC-10 ended in 1989 with 386 delivered to airlines and 60 to the U.S. Air Force as air-to-air refueling tankers. The largest operator of the DC-10 is US cargo airline FedEx Express. The DC-10 was succeeded by the related McDonnell Douglas MD-11. McDonnell Douglas, then Boeing after the two companies merged, upgraded some DC-10s with glass cockpits and renamed them MD-10s.
Source: Wikipedia, "McDonnell Douglas DC-10", available under the CC-BY-SA License.