A cookie, also known as an HTTP cookie, web cookie, or browser cookie, is a small piece of data sent from a website and stored in a user's web browser while the user is browsing that website. Every time the user loads the website, the browser sends the cookie back to the server to notify the website of the user's previous activity.
Cookies were designed to be a reliable mechanism for websites to remember stateful information (such as items in a shopping cart) or to record the user's browsing activity (including clicking particular buttons, logging in, or recording which pages were visited by the user as far back as months or years ago).
source: Wikipedia This website uses Google Analytics, a web analytics service provided by Google, Inc., a Delaware company whose main office is at 1600 Amphitheatre Parkway, Mountain View (California), CA 94043, United States ("Google"). Google Analytics uses "cookies" to help the website analyze how users use the site. Google Analytics cookies are of origin or first part which are associated to the domain that generates them, strictly limiting the purpose to the collection of statistical information. These cookies collect only anonymously navigation information. The terms of service prohibit Google Analyticis monitor or obtain data or personal information via the service and the association of personal information with web analytics data. The information generated by the cookie about your use of the website will be transmitted to and stored by Google on servers in the United States. Google will use this information on our behalf in order to keep track of your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage. Google may also transfer this information to third parties where required to do so by law, or where such third parties process the information on Google's behalf. Google will not associate your actual IP address with any other data held by Google. In this sense, Google Analytics does not provide information about your real IP address, but through the method known as "IP Mask" offered by the Google Analytics service itself, only using it partially without providing any personal information .
For more information about Chrome: http://support.google.com/chrome/bin/answer.py?hl=en-uk&answer=95647
For more information about Firefox: http://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences
For more information about Explorer: http://windows.microsoft.com/en-us/windows-vista/block-or-allow-cookies
For more information about Safari: http://support.apple.com/kb/PH11913