An alphabet that has an assigned name to each of the letters. For example, to say "computer" while using the phonetic alphabet you would say "Charlie-Oscar-Mike-Papa-Uniform-Tango-Echo-Romeo". Using the phonetic alphabet is extremely useful for computer support and anyone else on a phone call that needs to spell out what is being said or needs to be typed. Below is an example of the commonly used NATO phonetic alphabet.
Phonetic alphabet overview