A is for assimilation.
B is for baryon sweeps of starships.
C is four Cleveland, possible landing site for Klingon shock troops from decloaking Marauder-class starships in 1947.
D is for D7 battle cruisers of the Klingon Empire.
E is for "Engage!" (what else?)
F is for Federation Funny Farm.
G is for the Gorn territorial claims to Cestus III.
H is for human. There are humans serving aboard Federation ships, I think.
I is for the Incredibly Tight Bodysuits of Seven of Nine. Thank you very much Doc (the producers) for designing them.
J is for the Jenolen's fateful run-in with a Dyson Sphere in 2294.
K is for Klaang!!!
L is for the Last surviving salt vampire creature of planet M-113.
M is for miracle worker. That's we call Scotty back home.
N is for Nexus.
O is for Ops. The less Garak is seen parading through there, the better.
P is for Pakled mechanical incompetence.
R is for romance. Doesn't usually work in Trek episodes
S is for Sybok, older half-brother of Spock and the son of Sarek and a Vulcan princess.