The Boeing 707 was Boeing's first jet airliner. It was the most common plane in the 1960s and it was still used a lot during the 1970s. The 707 was the first jet to have a lot of passengers fly on it. The 707 was not the first jet airliner, but it was the first one to make a lot of money. It made Boeing one of the biggest makers of airliners. It also started the group of planes with "7x7" names. The Boeing 727, Boeing 737 and Boeing 757 have some parts of the 707's design.