The Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive, a nonprofit organization, based in San Francisco, California, United States. 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." 

Since 1996, they have been archiving cached pages of web sites onto their large cluster of Linux nodes. They revisit sites every few weeks or months and archive a new version if the content has changed. Sites can also be captured on the fly by visitors who are offered a link to do so. The intent is to capture and archive content that otherwise would be lost whenever a site is changed or closed down. Their grand vision is to archive the entire Internet.
Who set up the Wayback Machine?
Which two people set up the Wayback Machine?
What year did they start archiving cached pages?
What is the intent of the Wayback Machine?
What is the Wayback Machine?
What state is it based in?
What does the service enable?
Where do they archive cached pages of the sites onto?
What is the ultimate vision of the project?
How often are sites revisited?
Who can also capture sites on the fly?
What content is the Wayback Machine maintained with?
What is a "three dimensional index."?
Who is Brewster Kahle's sister?
the Internet Archive
the Internet Archive
Brewster Kahle and Bruce Gilliat
Brewster Kahle and Bruce Gilliat
1996
1996
to capture and archive content that might be lost after a site changes in some way.
to capture and archive content that otherwise would be lost whenever a site is changed or closed down. 
a digital archive of the World Wide Web and other information on the Internet
a digital archive of the World Wide Web and other information on the Internet created by the Internet Archive
California
California
users to see archived versions of web pages across time
users to see archived versions of web pages across time
Linux nodes
their large cluster of Linux nodes
archive the entire Internet.
to archive the entire Internet.
every few weeks or months
every few weeks or months
visitors who are offered a link to do so
 visitors who are offered a link to do so
content from Alexa Internet
content from Alexa Internet
archived versions of web pages across time
archived versions of web pages across time
unknown
unknown