List of U.S. state abbreviations - Wikipedia
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. ... Michigan (MI), Minnesota (MN), Missouri (MO), or Montana (MT).
DA: 99 PA: 82 MOZ Rank: 58