Nice article SDK.

There are two types of cookies session and persistent.

Session cookies -
Also called a transient cookie, a cookie that is erased when the user closes the Web browser. The session cookie is stored in temporary memory and is not retained after the browser is closed. Info from
: http://www.webopedia.com/TERM/S/session_cookie.html

Persistent cookies -
Also called a permanent cookie, or a stored cookie, a cookie that is stored on a user’s hard drive until it expires (persistent cookies are set with expiration dates) or until the user deletes the cookie. Persistent cookies are used to collect identifying information about the user, such as Web surfing behavior or user preferences for a specific Web site.
Info from: http://www.webopedia.com/TERM/P/persistent_cookie.html

On a side note: I think a lot of consumers have the wrong idea about cookies. A lot of them think cookies are spyware. Cookies are data, not applications, that are stored on the hard-drive. A very useful tool for insepecting cookies can be found here

http://www.karenware.com/powertools/ptcookie.asp

Also, a lot of useful information about cookies can be found here:

http://www.allaboutcookies.org/cooki...-used-for.html

I hope this helps. Computernerd22