We review the results of a consistent quantitative interpretation of the carbon KVV Auger line shapes of five different gas phase hydrocarbons (methane, ethane, cyclohexane, benzene, and ethylene), three solids (polyethylene, diamond, and graphite), and a molecularly chemisorbed system (ethylene/nickel). The normal kvv line shape accounts for only about half of the total experimental intensity for most of the Auger line shapes. The remaining part of the experimental line shape can be attributed to satellites resulting from resonant excitation or dynamic screening processes. The normal kvv Auger lines shapes are seen to reflect delocalized holes, however correlation effects are very evident. Although these screening and correlation effects complicate the interpretation of the line shapes, they provide a means to obtain unique chemical, electronic, and bonding information, and indeed cause the principal differences seen among the experimental line shapes. Keywords: Auger spectroscopy, Hydrocarbons, Polyethylene, Electron correlation.