where did the term show me state come from
Missouri Well-known Missourians include U.S. President Harry S. Truman, Mark Twain, Walt Disney, Chuck Berry and Nelly. Some of the largest companies based in the state include Cerner, Express Scripts, Monsanto, Emerson Electric, Edward Jones, H&R Block, Wells Fargo Advisors and O'Reilly Auto Parts. Missouri has been called the "Mother of the West" and the "Cave State"; however, Missouri's most famous nickname is the "Show Me State", as Missourians are known for being skeptical.[citation needed]
List of U.S. state abbreviations Modern two-letter abbreviated codes for the states and territories originated in October 1963, with the issuance of Publication 59: Abbreviations for Use with ZIP Code, three months after the Post Office introduced ZIP codes in July 1963. The purpose, rather than to standardize state abbreviations per se, was to make room in a line of no more than 23 characters for the city, the state, and the ZIP code.[12]