This article is from the alt.usage.english FAQ, by Mark Israel firstname.lastname@example.org with numerous contributions by others.
Brian Kelk (email@example.com) has a collection of radio
alphabets (A alpha, B bravo, C charlie, etc.), available on the WWW
at <http://www.cl.cam.ac.uk/users/bck1/phon.full.html>. For comic
alphabets (A for 'orses, B for mutton, C for yourself, etc.), see
Eric Partridge, "Comic Alphabets", Routledge & Paul, 1961. There's
one at <http://comedy.clari.net/rhf/jokes/90q1/cockney.1055.html>.