I have seen in literature regarding to auger line shape analysis about some terms such as band like, core like and atomic like auger spectrums. What are the main difference between these three type of features and how we identify or match the line shape we obtained from a differentiated AES spectra to say whether we have any of band-like, core-like or atomic-like auger process are occurring? What are the significance of these different auger process in predicting the chemical state information of DOS of that particular sample of analysis? Does these process have any significant effect on peak shift, intensity variations and peak broadening of AES spectra?