Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
The Resource Center contains a variety of reference tools and links to reference sources. You can connect online to the leading libraries of the world. Start at the Library of Congress, then go to the New York City Public Library and then pop around the world to visit dozens of the leading reference and resource centers.
