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It's simple with the new "AwesomeBar" this is a completely revamped URL bar in firefox 3. it lets you use the URL field of your browser to do a keyword search of your history and bookmarks. No longer do you have to know the domain of the page you're looking for - the AwesomeBar will match what you're typing (even multiple words!) against the URLs, page titles, and tags in your bookmarks and history, returning results sorted by "frecency" (an algorithm combining frequency + recency).

Great resource for school librarians. Many issues on how to maintain school library collections and manage a school library are discussed.

Another social bookmarking site

Great way to see the different word use frequency in presidential speeches throughout time.