You’re familiar with the phonetic alphabet, right? You know, Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu.
I’ve heard a couple of variations, but didn’t realize there were so many. As you might have guessed by now, there’s a web reference for them. My favorite is the WWII RAF one also: Apple, Beer, Charlie, Dog, Edward, Freddy, George, Harry, Ink, Jug/Johnny, King, Love, Mother, Nuts, Orange, Peter, Queen, Roger/Robert, Suga, Tommy, Uncle, Vic, William, X-ray, Yoke/Yorker, Zebra
[via Obtainium]