What are some social networking sites similar to LinkedIn?

My uncle has to get a new job, and it was recommended that he join some social networking sites such as LinkedIn to gain connections and speak to others in his profession. I was asked to gather a list of these sites for him, but the only thing I can think of is LinkedIn. I know there are ones like Facebook and MySpace, but I mean more professional-geared sites. Any suggestions?

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Tagged with: Facebook • Linkedin • Myspace • Networking • New Job • Profession • similar • sites • Social • Social Networking Sites • some

Filed under: Linkedin

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