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.
subset
In mathematics, especially in set theory, a set A is a subset of a set B if A is "containe" inside B. Notice that A and B may coincide. The relationship of one set being a subset of another is called inclusion.