This week, the company released a Web application called Little Black Book for Facebook members.

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You Need A Little Black Book of Potential Business: Before you begin a career transition, you need to have a list of people that you will call first.

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And in the center is LinkedIn's richest and fastest-growing opportunity: turning the company's 161 million member profiles into the 21st-century version of a "little black book" that no corporate recruiter can live without.

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But the people at Samsung were ready and the little black boxes, no bigger than a book, were already on display.

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