A sign for Google is displayed behind the Google Android robot at the National Retail Federation in New York. The announced changes to Google's privacy policy have drawn both positive and negative attention. Mark Lennihan/AP hide caption

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Facebook CEO Mark Zuckerberg shows Timeline during the f/8 conference in San Francisco in September. Paul Sakuma/AP hide caption

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A woman uses her smartphone on a street in Seoul. New rules are on the way to protect consumers from expensive data roaming fees, but for now, phone owners can take steps to help themselves. Kim Jae-Hwan/AFP/Getty Images hide caption

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