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Discussion :: Inventions

  1. When were bar code scanners invented?

  2. A.

     1940s

    B.

     1950s

    C.

     1970s

    D.

     1960s

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    Workspace

    Answer : Option C

    Explanation :

    The scanner reads the bar code label on something at a supermarket, and translates it into a number which the computer reads.


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