A is for Attenuating his Axial Servo, which Data did in Generations to open a magnetically locked door.
B is for Troi's & Crusher's firm Insurrection Boobs.
C is for Causality Loop. The Enterprise-D was caught in at least one of them.
D is for Data's balls.
E is for Exocomps. Data was utterly fascinated with the things.
F is for Fat Ferengi.
G is for Gorn clothing. It was skimpy. It was revealing. It was minimal.
H is for Holodeck. Data liked to play Holmes there.
I is for Iconian gateways.
J is for the Jarada, a mysterious insectoid race with a very difficult language for outsiders to speak.