A is for Anbo-Jytsu.
B is for B-4. Should have been Lore. Would have made Nemesis a better movie.
C is for Commodore. A frequently-encountered flag officer rank in Starfleet during the 22nd and 23rd centuries but eliminated by some point during the course of the 24th.
D is for Defiant. USS Defiant. An elusive Connie with aft phasers and torpedos.