Changes

The two-letter postal abbreviation system is complicated by the fact that several state names begin with the same letter (e.g., eight state names begin with ''M'' and eight begin with ''N'', four "New" and two "North"). To avoid duplications, some abbreviations are not intuitive.

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* {{URLwikipedia|List_of_U.S._state_and_territory_abbreviations|List of U.S. state and territory abbreviations|2021-10-13}}