US State Abbreviations - WorldAtlas
https://www.worldatlas.com/articles/us-state-abbreviations.html
WEBApr 16, 2019 · The Postal Service selected the first two letters for state names that contain one word, such as Florida (FL), California (CA), Alabama (AL), Delaware (DE), Massachusetts (MA), Illinois (IL), Indiana (IN) and Ohio (OH). For state names which start with the same letter, the first and last letter were selected, such as Kentucky (KY), and …
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