CNET GLOSSARY: Terms for the techie
A small data file written to your hard drive by most Web sites. Cookies typically contain such items as passwords, lists of pages you've visited, or the dates when you last looked at certain pages. Web sites usually read the cookies they leave every time you visit in order to track user behavior in aggregate. When you register at a site, cookies can make logging in later unnecessary, but they also enable a site to log every session under your name.
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