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State abbreviations were developed to provide a standardized way to represent U.S. states in postal addresses, facilitating mail delivery. The initiative was primarily led by the United States Postal Service (USPS) in the 1960s to improve efficiency and reduce confusion. The two-letter abbreviations were officially adopted in 1963 and have since become widely used in various contexts beyond mailing, including data entry and interstate commerce.

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1w ago

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