A (flat or organized) list of OnlineCommunity''''''s, that should help you find online communities that match your interest. Examples:

* MeatBall:back=CategoryOnlineCommunity
* http://dmoz.org/Computers/Internet/Cyberspace/Online_Communities/ (open directory)

''See also'': SelfOrganizingOnlineCommunityDirectory

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CategoryOnlineCommunity