Why on Earth would you not abbreviate? There are no marks in any marking scheme allocated for correct and complete spelling!
What about INCA, TNCA, Inv, Rbles, and Pbles too?
CSofFP, CSofI, SOCIETY, CSofCF as well.
Nci and Reval Res are also in there
Will you be penalised? If it’s a toss up between you and another student for the global prize and you have abbreviated where the other student hasn’t then, yes, I suppose the other one will get the global prize. Now, ask yourself “Is this where I’m aiming?”