Energetic descriptors(potential,heat of formation,dipole moment,EHomo,Elumo...) Lipophilicity descriptors(Mlp,Logp,solubility...). Steric descriptors(volume,surface,ovality,solvent_accessible surface..) Classification descriptors Topological indices :(2D and 3D Wiener indices,Balaban,Kier,Kappa,flexibility.. External descriptors(to provide by user)