Although it was not the first commercial jet in service or the first to be commercially successful (both titles going to the DeHavilland Comet and Tupolev Tu-104, respectively), it is generally credited as ushering in the Jet Age in the West. It established Boeing as one of the largest makers of passenger aircraft, and led to the later series of aircraft with "7x7" designations. The type's passenger-carrying career ended after nearly 55 years when Saha Airlines, the last commercial operator, ceased operations in 2013.