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.
ca.
Circa (often abbreviate c., ca., ca or cca. and sometimes italicized to show it is Latin) literally means "about" or "around". It is widely used in genealogy and historical writing, when the dates of events are approximately known.