A is for the Andorian Imperial Guard.
B is for the Breen. They look like a certain character from "Return of the Jedi". But larger.
C is for Captain Kirks smooth hairless chest.
D is for the Defiant's cloaking device.
E is for Elasian tears.
F is for Ferengi earlobes, a symbol of business skill and prowess.
G is for Grumpy CMO's
H is for Harry Mudd's moustache.