Wikipedia is to my information the largest and most detailed encyclopedia in the whole world. It is multilingual. And the most interesting feature is that this is all but absolutely free. When you type the URL www.wikipedia.com, the screen will show languages such as English, Deutsch, Francis, Pol ski, Chinese, Italian, Spanish and two more. I go on with the English one. When you enter you will find that it is much more than just an encyclopedia. Its main page consists of featured article, news, facts and what had happened in history on that particular day and a featured picture. There are also links to other areas of wikipedia. There is wikitionary, wikibooks and many more. you will know the full potential of the site when you log in. Search for the topics and downloads pictures and enjoy wikifully.