You may have noticed that some UPC bar codes are shorter than others. These shorter codes are called “zero-suppressed numbers” and are used for smaller packages. To obtain a shorter code, the original UPC bar code is shortened by leaving out four digits. Research on the Internet the rules for shortening bar codes. Use keyword “UPC” or go to www.howstuffworks.com/upc.htm. Explain how to derive zero-suppressed numbers from the standard UPC bar codes, and give several conversion examples.
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