In 2001 Wikipedia started to serve as an encyclopedia using Wiki Markup Language technology to allow users: registered or not to read articles as well as to write and to edit the articles that it contained. Jimmy Wales from Bornis Inc. bought a complete web hosting complect to make it easy to interact with Uniform Resource Locator pieces, like names, titles and etc.; he became given a great change to Wikipedia to develop. Mediawiki, the owner of Wikipedia, started some other projects using WML(Wiki Markup Language) technology along with Wikipedia. The slogan is "Wikipedia, the free encyclopedia that everyone can edit".
Jimmy Wales later on became its CEO and Lawrence Mark Sanger became its president and co-founder along with the previous.
Wikipedia, only one from lots of Mediawiki projects, consists of more than 10900000 articles and 16 billion words. Mediawiki had promised to collect all human being knowledge under a "ceiling" when it started.
Here the weird is that web units behaving like tallies make their owners earn million dollars of money do not have so much to go around in fact. But looking at Mediawiki Inc., we see it is not in any commersial aim and to support itself financially, it began to declare to get donated by the users - guess what - to reach US$ 6000000. Yahoo! earns thousands times of it a year though.