1. Search: now faster than the speed of type.
http://googleblog.blogspot.com/2010/09/search-now-faster-than-speed-of-type.html
2. iPubMed Search.
http://ipubmed.ics.uci.edu
3. Apache.
http://httpd.apache.org/
4. Elicit Search.
http://elicitsearch.com/
5. Jansen, B.: Search log analysis: what it is, what’s been done, how to do it. Libr. Inf. Sci. Res. 28(3), 407–432 (2006)