A is for Alpha Centauri, whose human colonies were wiped out by the Xindi in the timeline of "Twilight"
B is for Bombing of the Earth Embassy on Vulcan
C is for Coalition of Planets, the proto-Federation beginning to form by series end.
D is for Denobula Triaxa, the home star system of the Denobulan race.
E is for T'Pol's Excellent bum.
F is for Football, AKA Soccer, still going strong in 2155
G is for Gavimetric sweet spot. Travis' favorite spot on the ship. Which he shared with Trip.
H is for Hoshi Sato