A is for Admiral Nogura.
B is for Bynars.
C is for Caitians. Hairballs are against regulations.
D is for Dopterians.
E is for Extra Sensory Perception.
F is for Fabrini Instrument of Obedience.
G is for Good vs Evil. Who will win? I don't know.
H is for Hirogen hunting trophies mounted on the bulkheads of their ships.
I is for Iconian Gateways.
J is for Jupiter Station.
K is for Kaferian apples.
L is for Lissepians.
M is for Metrons.
N is for Nausicaan piracy and attacks on 22nd century Earth cargo freighters.
O is for Odo.
P is for the President of the United Federation of Planets.
Q is for Quantum torpedoes.
R is for Romulan cloaking technology. A form of it existed as early as the year 2152, prior to first contact with Earth humans.
S is for Seven of Nine's bum. And other lady bits. Resistance IS futile.
T is for T'Pol's Tits.
U is for Underwear. Mid-22nd century Starfleet versions were blue in color and accentuated certain bulges.