| @decorativeed: as far as I know (not being from the US either), abbreviations by two capital letters were introduced in 1963, but abbreviations like "Mass." for Massachusetts or "Okla." for Oklahoma were of course used earlier. The old abbreviation for Georgia was "Ga.", for Kentucky "Ky.", for Pennsylvania "Pa.", for Virginia "Va.", etc. The new abbreviations simply kept those traditional ones, only capitalizing both letters. (Also I learned somewhere that, existing two one-word states beginning with Ne-, originally Nevada was NV and Nebraska NB, but as some letters addressed "NB" were erroneously sent to the Canadian province of New Brunswick, the code for Nebraska was changed to NE). |