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P. Vasudevan
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When were bar code scanners invented?
When were bar code scanners invented?
A. 1940s B. 1950s C. 1970s D. 1960s
1 vote (100%)
A. 1940s B. 1950s C. 1970s D. 1960s
a)1960 b)1950 c)1940 d)1970
0 votes (0%)
a)1960 b)1950 c)1940 d)1970
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