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Latest periodic table for The Postal Savings System was eliminated in 1960, largely because deposit insurance dampened its appeal. United States Postal Service 881 The postal system continued to grow after World War II. The Post Office added certified mail in 1955 and implemented the use of ZIP codes in 1963. In March 1970, after the House Post Office Committee reported a compromise measure to restructure the system, the country was rocked by the first-ever nationwide strike of federal employees, as 152,000 postal workers walked out in over 600 locations, preventing mail delivery. The strike was ended when President Richard NIXON threatened to use the military to deliver the mail, negotiations resumed that granted workers substantial raises, and Congress finalized the reorganization of the system, removing the Postmaster General from the Cabinet and creating the United States Postal Service as an independent agency of the federal government. The late 20th century brought renewed competition to the USPS. In 1979, its monopoly on express mail was lifted and private businesses, such as UPS and FedEx entered the market, easily outperforming the USPS. Latest periodic table 2016.

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