For questions related to the Gaussian electronic structure program

Gaussian is an electronic structure package initially developed in the 1970s by John Pople's research group at Carnegie-Mellon. Since then, the program has expanded dramatically, offering a wide range of different methods (e.g. DFT, CASSCF, Coupled Cluster, Moeller-Plesset-n), properties (e.g. NMR, ECD/VCD, Optical Activity, UV-Vis, (hyper)-polarizabilities), and technical capabilities (e.g. multicore/processor, GPU, Gaussview visualization).

For more info, see the latest version of the software, Gaussian 16