http://www.flickr.com/photos/40families/309687728/
From the 40 Families project: Snow in Palos Verdes
Tagging is similar to subject headings. With Web 2.0 users have been able to assign their own subjects and keywords to content. Previously, this was strictly the domain of librarians.
An online community is basically a group of people with the same interests sharing ideas. They will likely never meet in person, or even know what each other looks like.
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