International Radiotelephony Spelling Alphabet

The NATO phonetic alphabet is the most widely used radiotelephone spelling alphabet. It is officially the International Radiotelephony Spelling Alphabet, and also commonly known as the ICAO phonetic alphabet, with a variation officially known as the ITU phonetic alphabet and figure code. 

The 26 code words in the NATO phonetic alphabet are assigned to the 26 letters of the English alphabet in alphabetical order as follows: Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu.

(Credit to Wikipedia for this content)