The first aircraft to be known as a “jumbo jet” was the Boeing 747. It was the first wide-body airliner, first to employ twin aisles. It also had three decks, with the lowest one used by some airlines for galleys as well as cargo. Other draft to carry the jumbo-jet label are the Autonov An-225 and An-124, Lockheed C-5 Galaxy, and Shuttle Carrier Aircraft.