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Figure This!

 

The abbreviation UPC stands for Universal Product Code. The figure below shows a typical UPC code. How does this type of bar code differ from the US Postal Service bar code?

 

How does the US Postal Service handle pieces of mail that do not have bar codes on them?

Before UPC codes were invented, how did cashiers know the price of an item?

UPC labels are never printed in red ink. Why not?

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