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This signature has been developed with reference to the basic structure of Gaussian input files as described: http://www.gaussian.com/g_tech/g_ur/m_input.htm and http://chemistry.umeche.maine.edu/Modeling/GGGauss.html. 
The 'Route Section' describes the 'Basis Set' used, as listed here: http://www.gaussian.com/g_tech/g_ur/m_basis_sets.htm. The current signature includes the basis sets AM1,PM3,STO-3G,3-21G,3-21g,6-31G,6-31g and augcc-pvtz. It is likely that additional basis sets have been used in this format, if this has been perceived then please feed this back to PRONOM so the signature can be improved.</SignatureNote>
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