Google has opened access to the search index in 2001

How to write Google themselves:
“We were ten years old, and we found that for a very long time we didn’t do spring cleaning. We began to dig in the basement and found a bunch of rubbish: Swedish fish , pigeon shit , books on translation from Klingon .
And in the corner, under the lab coats of Larry and Sergey, we were surprised to find the ancient search index in good condition. We shook off the dust and started it. It's amazing how much the web of the time was different from today. " iPod " was not a player, the word " youtube " meant nothing, and if you were looking for " Michael Phelps ", you would have found not a swimmer, but a scientist. " Wikipedia " just started.
Searching for this index was so much fun that we uploaded it online for general use. We thought it would be even more cool if we could look at the full versions of the old web pages, so we put links to the cache of the 2001 pages from the Internet Archive . Come and try Google search 2001. "

Original article: http://googleblog.blogspot.com/2008/09/2001-search-odyssey.html

Taken from here