A is for Altair VI.
B is for Brunt. FCA and for Barclay, He was transporter-phobic.
C is for the Celestial Temple aka DS9's wormhole.
D is for the Defiant.
E is for the Tennis Elbow Guinan claimed to suffer from to give Beverly a friendly kick in the butt.
F is for the Federation Funny Farm.
G is for Gowron, his selfishness led Worf to kill him.
H is for the Hurq.
I is for Indians, they are quite present in ST.
J is for J'naii. Riker was very friendly with one of them.
K is for Klingon bastards!
L is for Lonzak, he was Chaotica's stupid henchman.
M is for multilinguist as in Hoshi Sato
N is for Narendra III.
O is for Odo's paramour... Kira.
P is for Polycocyx Astris, a space-dwelling microbe.
Q is for Qo'noS.
R is for Lieutenant Rahda, presumably one of the Indians that was referred to earlier in the "I" entry.
S is for Sisko's son, Jake.
T is for Elizabeth Tucker, victim of the Xindi.