terminology..
All Good Kids Like Milk is a Mnemonic. (btw, I've seen pneumonic and mneumonic both used in internal
UPS docs *shudder*)
an abbreviation is shortening any term to something smaller. Dr for Doctor is an abbreviation as is FBI for Federal Bureau of Investigation.
Acronyms are abbreviations which are designed to be used as words in themselves. eg PAS or EDD or LASER. They usually take just the initial letter but not only, see RADAR (RAdio Detection And Ranging)
anagram is reording of the letters in a phrase to make another phrase. It was actually used in the early modern period to show that you knew a secret without giving the secret away (write a phrase in Latin describing what you knew. publish an anagram of that phrase
This thread has been doing the opposite of acronyms. I think the term is retronym.
and now to stay on topic. this one was from a cheesy book I read in grade school, and I'm almost embarrassed that a) I read it and b) I remember this part.
Untied
Parcel
Service
which has a rather simple anagram in the first word