Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

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A planet is a large, rounded astronomical body that is neither a star nor a stellar remnant. The Solar System has eight (pictured): four terrestrial planets ...

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Multi-factor authentication is an electronic authentication method in which a user is granted access to a website or application only after successfully ...

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A wiki is a form of online hypertext publication that is collaboratively edited and managed by its own audience directly through a web browser.

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Wikipedia is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and ...

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This is the front page of the Simple English Wikipedia. Wikipedias are places where people work together to write encyclopedias in different languages.

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XWiki is a free wiki software platform written in Java with a design emphasis on extensibility. XWiki is an enterprise wiki. It includes WYSIWYG editing, ...