Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
On Computable Numbers with an Application to the Entscheidungsproblem
Turing's paper which discusses the halting problem in the context of Gödel's Incompleteness Theorem. HTML.