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- ZIP Code
Numeric postal code used in the United States and its territories
A ZIP Code (an acronym for Zone Improvement Plan) is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address. Introduced on July 1, 1963, the basic format comprised five digits. Wikipedia
