A is for Alpha Carinae V.
B is for Borg
C is for the Charybdis, launched by NASA in the year 2037 on a failed mission to explore beyond the boundaries of Earth's solar system.
D is for Deltans.
E is for Ekosians. Blasted space Nazis.
F is for Ferenginar.
G is for Galorndon Core.
H is for the Haakonians. They don't like Talaxians.
I is for Ilia of Delta IV.
J is for Jouret IV.
K is for Kelvin. The USS Kelvin. Too bad it didn't self destruct with a warp core breach. Then no more Narada.
L is for Lore, the slightly older, less technologically successful and much more malevolent brother of Data.
M is for Morn. Real talkative guy.
N is for Nog, son of Rom and nephew of Quark.
O is for Orbital Decay. I guess that they don't teach astrophysics at Starfleet Academy. Specifically non-powered orbits.
P is for Positronic brains
Q is for Quantum Theory
R is for Riker
S is for Sargon's Planet, victim of a global war and cataclysm that left that world uninhabitable six hundred thousand years before the Enterprise's visit in 2268.