Research the history of the ZIP code. For information about ZIP codes on the Internet, go to the U.S. Postal Service website at www.usps.com. Summarize your findings in a report and be sure to include answers to the following questions: What does “ZIP” stand for? When was the code created and why? What do the digits in the ZIP code stand for? When was the ZIP code expanded to the ZIP + 4 format? How is the new delivery-point code determined from the ZIP + 4 code? Pick one state and sketch a map showing the ZIP code delivery areas.
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