7. Encyclopedia - Wikipedia
Link: https://en.wikipedia.org:443/wiki/Encyclopedia
Description: WebToday, Wikipedia has 6,813,154 articles in English, over 60 million combined articles in over 300 languages, and over 250 million combined pages including project and discussion pages. Since 2002, other free encyclopedias appeared, including Hudong (2005–) and Baidu Baike (2006–) in Chinese, and Google's Knol (2008–2012