Wikipedia is a free online encyclopedia that allows users to edit and contribute content. Its history can be traced back to a few key milestones: 1. **Founding**: Wikipedia was launched on January 15, 2001, by Jimmy Wales and Larry Sanger as a part of the non-profit organization Wikimedia Foundation. Wikipedia was initially conceived as a complementary project to Nupedia, a free encyclopedia that had a formal editorial process and was largely written by experts.
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