One of the slightly more useful things I've learned from my husband's military job is the existence of the ICAO alphabet. We actually just call it the "(standard) phonetic alphabet," and sometimes I annoy B by trying to rattle the whole thing off on my own. There's always a few I can't remember, and he holds out on me until I cave. Whether I can remember them or not, I can recognize immediately who knows it and who doesn't when I'm conducting phone business or whatever. A is not for Apple, and D is not for Dog. If you know anything about this, check your knowledge with this quiz over at mental_floss. This picture to the right should help jog your noggin!
And if you know nothing about it, read up on it over at Wikipedia and start memorizing! It will help your life, I promise.