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The site can now provide summaries and stats that offer a window on your life months or years in the past.
The app uses either your photos or e-mail history to organize your various social worlds into distinct groups.
Users can share information, but the network only sees encrypted data.
What happens when your online pals meet your TV?
Do blogs and tweets help a company’s bottom line? One startup thinks it has the answer.
U.S. companies that pass data from European Union citizens to the NSA’s PRISM surveillance program could be breaching the E.U.’s data-protection laws.
The fortunes of the world’s largest social network depend on how much it can earn from mobile advertisements.