NATO phonetic alphabet by those who exchange voice messages by radio or telephone, regardless of language differences or the quality of the communication channel. The 26 code words in the NATO phonetic alphabet are assigned to the 26 letters of the English alphabet in alphabetical order as follows: , Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, , Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu. Strict adherence to the prescribed spelling words is required in order to avoid the problems of confusion that the spelling alphabet is designed to overcome. As noted in a
Obsolete and nonstandard symbols in the International Phonetic Alphabet Obsolete and nonstandard symbols in the International Phonetic Alphabet The International Phonetic Alphabet (IPA) possesses a variety of obsolete and nonstandard symbols. Throughout the history of the IPA, characters representing phonetic values have been modified or completely replaced. An example is for standard . Several symbols indicating secondary articulation have been dropped altogether, with the idea that such things should be indicated with diacritics: for is one. In addition, the rare voiceless implosive series has been dropped. Other characters have been added in for specific phonemes which do not possess a specific symbol in the IPA. Those studying modern Chinese