From the 1960s onward, the rotary dial was gradually supplanted by dual-tone multi-frequency push-button dialing, first introduced to the public at the 1962 World's Fair under the trade name Touch-Tone®.
20th Century Fox | American Association (19th century) | American Association (20th century) | World's Columbian Exposition | Louisiana Purchase Exposition | Pan-American Exposition | Panama-Pacific International Exposition | Century Park | Century of Progress | Century Media Records | Century 21 | Baltimore Orioles (19th century) | 20th Century Boy | St. Louis Exposition | Panama–Pacific International Exposition | Exposition Internationale des Arts et Techniques dans la Vie Moderne | End of the Century: The Story of the Ramones | Century Park (ETS) | Century City | Century Association | century | Zenon: Girl of the 21st Century (film) | Zenon: Girl of the 21st Century | Roman Republic (19th century) | Centennial Exposition | Car of the Century | Wang Wei (8th-century poet) | Panama-Pacific International Exposition (1915) | Lipstick Traces: A Secret History of the 20th Century | Irish Volunteers (18th century) |
The group was founded in 1963 to hold an auction to retire the US$35,000 debt accumulated by the Seattle Symphony's critically successful performance of Verdi's Aida at the 1962 Seattle World's Fair, the Century 21 Exposition.