The Internet Archive uses the term Wayback Machine as the name for the snapshot archives of the World Wide Web. This service allows users to see archived versions of web pages of the past — what the Archive calls a "three dimensional index."
Not all web pages are available, however, because many website owners intentionally exclude their sites. The use of the term "Wayback Machine" in the context of the Internet Archive has become so common that "Wayback Machine" and "Internet Archive" are almost synonymous.
|This page uses Creative Commons Licensed content from Wikipedia (view authors).|