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Guest columnist Matthew MacArthur talks about the phenomenon of Web 2.0 which embraces a variety of concepts, some having to do with specific technologies and new ways of thinking about the architecture of the Web.

Web 2.0 embraces an approach to generating and distributing content characterized by open communication, decentralization of authority, freedom of sharing, and reuse.

Examples include MySpace, Facebook, Youtube, and Wikipedia.

Most importantly, says MacArthur, Web 2.0 challenges museums and other types of institutions to re-think entrenched attitudes toward the control and dissemination of information, and be open to the mutual benefits of allowing passive users to become active participants.