The abbreviation for North Dakota is ND. It's part of the U.S. postal abbreviations that were introduced in 1963 to help with efficient mail sorting and delivery. Each state has a two-letter abbreviation, with the first letter always representing the initial of the state's name, and the second letter chosen to avoid any duplications. So, North Dakota gets ND, distinguishing it from nearby Nebraska, which is assigned NE. This system ensures that each state has a unique, recognizable code that is easy to remember and use.
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