Wayback Machine

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 - wikipedia

Wayback Machine logo, used since 1996 - wikimedia.org

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.

Snapshots used to take at least 618 months to be added, but now sites can be added in realtime by request by scrolling down the results page. A "Save Page Now" archiving feature was made available in October 2013 accessible on the lower right of the Wayback Machine's main page - blog.archive.org

Once a target URL is entered and saved, if the target web site permits access via robots.txt, the web page will become part of the Wayback Machine.