-aee
-bee
-see
-dee
-eee
-eff
-gee
-aaach
-i
-jay
-kay
-ell
-emm
-enn
-ooo
-pee
-cue
-are
-ess
-tee
-you
-vee
-doubleyou
-eks
-why
-
zee
If you look at them, they all either begin or end with a vowel sound, but not ZED. It just doesn't flow. It doesn't really matter though, because chances are, none of us will ever speak with each other so its pointless to argue...............................and yes, I do say ZeeR-1, because it still sounds better