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At the end of 1942, the number of African American workers in the United States Postal Service doubled
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Transmora, a foreign-manufactured, multi-position letter sorter was created and introduced into the USPS.
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The Zip Code system was introduced
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The Post Office Department is reorganized as the United States Postal Service (USPS) and becomes an independent agency.
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The Postal Service installed its first computer-operated OCRs and barcode sorters (BCSs) and the next year introduced the ZIP+ 4 code to further define address sectors in any geographical area.
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USPS introduces Delivery Confirmation service and PC Postage.
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The Postal Accountability and Enhancement Act of 2006 was created.
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If it were a private sector company, the U.S. Postal Service would rank 43rd in the 2014 Fortune 500.
