http://www.archive.org The Internet Archive non-profit project established in 199_ has taken electronic "snap shots" every 3 or 6 months of almost all of the Internet sites existing at the time of each "shooting" almost since the advent of the world wide web (www) global public version of the Internet in 1991. The "snap shots" (i.e. copies of web pages on each web site 'touched' by the Archive's 'Internet robots') are stored in a huge digital data storage facility in downtown San Francisco, CA, USA. The visitor to the Archive web site, www.archive.org, can search for past revisions (or versions) of web pages of existing web sites and of web sites that no longer exist on the Internet. The Archive also links to their "virtual library creation project" for schools and universities which the Internet Archive project has facilitated since 199_. NOTABLY since 2005 the Internet Archive project has had a 'child project' called the Open Library Project. See "Open Library" on this web site for more information or go to www.openlibrary.org.