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Associated Press
This combination of Associated Press file photos shows, left, mail carrier Mike Gillis delivering mail in 2011, in Montpelier, Vt., and right, Microsoft Outlook being demonstrated on a desktop computer in 2013, in New York. The number of "mail carriers" in the U.S.  fell 10 percent from 358,000 to 321,000 in ten years through 2010. (AP Photo)

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