Wikimedia Commons, the multimedia repository shared by Wikipedia and all other projects operated by the Wikimedia Foundation, has been a wonderful success story, having grown to more than 4.5 million educational, freely usable media files since its inception in 2004. But the combination of the complexity of free content licensing and the integration of Commons into the experience of contributing to a project like Wikipedia or Wikibooks can make for a very daunting experience for new contributors.
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Source: Wikimedia
