Wayback Machine

The Wayback Machine is an online archive of Web pages that have been archived by the Internet Archive, a nonprofit organization based in San Francisco, California. The Wayback Machine was created in October 2001 by Brewster Kahle and Bruce Gilliat, and is maintained with content from Alexa Internet.

The Internet Archive began using the Wayback Machine to archive select Web pages in October 2001.

The intent was to capture and archive content that would otherwise be lost when the original pages were removed from the Web.

In 2002, the Wayback Machine began archiving cached pages of Yahoo!

websites.

In 2003, the Machine began archiving cached pages of Google websites.

The Wayback Machine is accessible from the Internet Archive website, and from a number of other websites that have incorporated the Internet Archive's code, including the Google-owned website search engine, Google.com.

The Wayback Machine is also accessible as an API, from which developers can create applications that access the archived content.

The Wayback Machine contains almost 150 billion Web pages, and is growing at a rate of about 20 billion pages per month.

The Wayback Machine is updated with new content on a daily basis.