GT, GTX, GS, XT etc

[kappa84]

After doing some researches on several websites, I've discovered what most of the graphic cards' abbreviations stand for:

Pro=Professional
GS=Graphic Standard
GT=Graphic Trademark
GTS=Graphic Trademark Standard
GTX=Graphic Trademark Extended
XT=extended Trademark
GTX Ultra=Graphic Trademark extended ultra

Still, I can't find out what does LE, GTO and FX mean...Does anybody have a clue?