PCWorld.com - Privacy Watch: How Much Does Google Know About You?

PCWorld.com - Privacy Watch: How Much Does Google Know About You?: "If you use Google, for instance, and are not blocking cookies, the search engine likely has placed a cookie on your system that won't expire until 2038. That cookie lets Google track what you searched for, when you conducted the search, and which results you clicked. The cookie doesn't identify you by name, but it does identify you by your system's information and IP address."