What's up with these cookies? Here is the definition you can find on Wikipedia: "HTTP cookies, or more commonly referred to as Web cookies or just cookies, are parcels of text sent by a server to a web browser and then sent back unchanged by the browser each time it accesses that server. HTTP cookies are used for authenticating, tracking, and maintaining specific information about users, such as site preferences or the contents of their electronic shopping carts. The term 'cookie' is derived from 'magic cookie', a well-known concept in UNIX computing which inspired both the idea and the name of HTTP cookies."
