LG, LN, LE, NG, TN, NE, CG, CN, CE... those are for all the alignments. L always stands for Lawful, G for Good, N for Neutral, E for Evil, C for Chaotic, T for True.
HiPS stands for Hide in Plain Sight (took me a while to get that)
MS (Move Silently the skill) H (Hide the skill) Usually they'll be used together H+MS or something.
MA (Mistone Alliance)
I'm sure there is a hundred more that I can't think of, I'll post them if I remember any.