What is a cookie?
A cookie is a small text file that may be stored on your computer or mobile device that contains data related to a website you visit. It may allow a website “remember” your actions or preferences over a period of time, or it may contain data related to the function or delivery of the site. Cookies can be set by the owner of the website or in some cases by third party services the website owner allows to present other information, run content or provide other functionality such as analytics.
Further information on cookies can be found at: http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm
How are they used on this site?
If you are not happy, then you should either not use this site, or you should delete the cookies having visited the site, or you should browse the site using your browser’s anonymous usage setting (called “Incognito” in Chrome, “InPrivate” for Internet Explorer, “Private Browsing” in Firefox and Safari etc.)