A is for Antedian Ambassadors. Who would've guessed they were really terrorists they looked so trustworthy.
B is for the Beta Quadrant.
C is for Cordrazine.
D is for Delta Flyer. Built using Tardis technology. Bigger on the inside than on the outside.
E is for Enterprise wall sculptures in the 1701-D observation lounge. The Enterprise-B and the Enterprise-C didn't look exactly like the ships we've seen and Jonathan Archer's NX-01 isn't in there at all, but let's just assume the person who designed and made the sculptures took some artistic license or was instructed to make it look a certain way.