When R/T was introduced just prior to WWII a phonetic alphabet was introduced by many, not all countries. They varied according to language. English was A Able, B Baker and so on. After WWII it became evident that an international phonetic alphabet was necessary, so the NATO alphabet was adopted and also accepted by ICAO. So, Alpha, Bravo, etc. Interestingly, the USAF used F Fox instead of foxtrot for the longest time. On time, Zulu time, or GMT was so called because the symbol (Z with a vertical line) is that used at the Naval College at Greenwich where the meridian passes through. There's supposed to be no confusion when using the NATO phonetics, but just ask one of your friends to say Charlie Quebec Quebec Foxtrot Uniform without upsetting anyone.
