Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a non-profit organization, based in San Francisco, Calif. It was set up by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet. The service enables users to see archived versions of web pages across time, which the Archive calls a "three dimensional index."
The name Wayback Machine was chosen as a droll reference to a plot device in an animated cartoon series, The Rocky and Bullwinkle Show. In one of that animated cartoon's component segments, Peabody's Improbable History, lead characters Mr. Peabody and Sherman routinely used a time machine called the "WABAC machine" (pronounced "Wayback") to witness, participate in, and, more often than not, alter famous events in history.
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