The Tupolev Tu-104 (NATO reporting name: Camel) was a twin-engined medium-range turbojet-powered Soviet airliner. After the British de Havilland Comet, Canadian Avro Jetliner, and the French Sud Caravelle, the Tu-104 was the fourth jet airliner to fly, and the second to enter regular service. It was also the sole jetliner in service in the world from 1954 to 1958.