Which of those would you like?
Hartree-Fock, Density Functional Theory (DFT), and high-level post-Hartree-Fock methods (MP4, CCSD, etc.). Excited States: Modeling UV-Vis spectra via TD-DFT. gaussian 16w download
Gaussian 16W is a commercial computational chemistry software package, and it is not available for free download through official channels Which of those would you like
Test by opening Command Prompt and typing g16 < test01.com . You should see the job start. Density Functional Theory (DFT)