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While open social systems, such as Flickr and del.icio.us,
are very popular among web users for resource sharing and
networking purposes, special-purpose social sites can offer
valuable services to well-defined, closed, communities, e.g.,
in a university or in a corporation. The purpose of this demo
is to show the challenges, special features and potential of
a focused social system in action through CourseRank, a
course evaluation and planning social system.