I’ve never liked the abbreviation for Oklahoma. Abbreviations should never spell words that could later be misconstrued as the actual word. Case in point:
Today’s headline from the Daily Beast Twitter feed:
2 Killed in OK tornadoes ... At least 4 twisters hit southeastern region of state.
Yes, it only took me less than a second to realize the tornadoes were not receiving the Daily Beast’s seal of approval, but that was a rather appalling microsecond of confusion.