Well, I'm still not sure on all of them myself, but here I go...
ADF: African Dwarf Frog
ACF: African Clawed Frog (never ever get these confused, it's like confusing a grown cat with a grown tiger...)
DP: Dwarf Puffer
Apisto: Apistogramma (I think I spelled that right) A group of dwarf cichlids.
(sp): Means that a person isn't sure of the spelling, so bear with them lol.
BBS: Baby Brine Shrimp
TFF: Tropical Fish Forum lol
That's all I can think of now, those are the ones I see most often.