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.
Google
Search: suggestions, comments, and questions about our web search
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regarding press and business services
Google Groups: feedback
about our Usenet discussion search
Google Web Directory: feedback
about our categorized web directory
The Google Toolbar: feedback
about our browser add-on search tool