A is for Alpha Eridani II.
B is for Betazed.
C is for Cestus III
D is for Deneb IV, home of Farpoint Station
E is for Eminiar VII
F is for Ferenginar
G is for Gagarin IV
H is for Hoek IV
I is for Indri VIII
J is for Jupiter(as in location of Jupiter Station)
K is for Krios
L is for L-370 system. In which USS Constellation was lost after encountering the planet killer
M is for Mazer, home of the Mazerites.
N is for Nagilum
O is for Orion, where it's not easy being green