Multiple choice general knowledge science & technology

When were bar code scanners invented?

  1. 1940s

  2. 1950s

  3. 1970s

  4. 1960s
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Commercial barcode scanners were first implemented in 1974 at a Marsh supermarket in Ohio, though the barcode patent was filed in 1949. The practical scanning era began in the 1970s with the Universal Product Code system.

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