Wikipediaencyclopedia made with a wiki.
There are different Wikipedias written in many languages - there are more than 15,000 articles in at least eight of them. It is open content. Many people write it.
The Simple English Wikipedia was created on September 18 2001 in order to let people who are learning English use Wikipedia. On 18 December 2003, the Simple English Wikipedia began using the MediaWiki software.