Scotty had the idea to start using the NATO phonetic alphabet after I expressed my frustration with constantly getting the letters in a game's serial number wrong. He was reading them off to me and naturally I kept mixing up certain letters. S and X, M and N, and many others that can be tricky to differentiate. He made up a sign that listed the NATO phonetic alphabet and put it between our computer desks. Now when we need to spell something out to each other, which happens for computer game serial numbers, web addresses, etc., we can refer to the list (or try to memorize it - I'm getting better, but I'm not quite there).
Note: Scotty does know how to fingerspell in American Sign Language, but verbal communication is easier when I'm looking at a computer screen trying to type what he's spelling as he spells it.
I can think of lots of ways the phonetic alphabet could help me with other people. Lots of people spell things to me on a daily basis, and if they knew the alphabet, things would go much more smoothly. But considering the logistical nightmare that it would be to try to explain it to people and get them to use it, I think I might keep it just in the family for now.
Here is a PDF of the sign Scotty made for us, and the alphabet is listed below.