LinkedIn is a social networking website for professionals. Founded in December 2002 and launched on May 5, 2003, it is mainly used for professional networking. As of June 2012, LinkedIn reports more than 175 million registered users in more than 200 countries. LinkedIn has 21.4 million monthly unique U.S. visitors and 47.6 million globally.
Users : Social network profiles, personal information, contribution of information to user-formed interest groups
Employers : Descriptions and lists of jobs
Hiring Managers : Profile for allowing users to identify hiring track
Companies : Profiles
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