is an ab initio
quantum calculation suite. This means it is software capable of producing values for observable physical properties of molecules through the application of quantum mechanics. The Gaussian line of software is very popular amongst laboratory chemists and beginning physical chemists as it is one of the easiest ab initio software packages to learn. With Gaussian, we can find emission and absorption spectra for molecules, discover the energy of transition states for chemical reactions, model large molecular structures to find areas of activity, as well as quantify a long list of physical traits and make predictions about molecular behaviors. This tutorial intends to provide the user with the basic skills of creating, submitting, and interpreting a structure optimization calculation. The last portion of the tutorial briefly discusses responsible computational resource use via scaling.