The random 18-digit code plus two check digits will have a four-digit prefix added and it will have intelligence in it.

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All that the user needs to do is swipe the card at the existing check-out machine and enter a four digit PIN.

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Furthermore, Wilson, the only president with a doctorate, tried to use the newly created Federal Reserve system and an elastic money supply to keep inflation in check, but the U.S. still saw double-digit inflation from 1917 to 1920.

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The lower that two digit number is - like say 05 - the sooner your check gets cut.

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The time it takes to check your hand remains a little longer than it would take you to drum in your typical four-digit PIN, but in our brief test, it was able to discriminate between two Engadget editors' hands.

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