GAMESS (US) is maintained by the members of the Gordon Research Group at Iowa State University.

[7] GAMESS (US) source code is available as source-available freeware, but is not open-source software, due to license restrictions.

The RI-MP2 and the RI-CC code benefit from a MPI/OpenMP parallelization model allowing for great scaling and fast calculations.

The QUAO analysis allows users to study bonding patterns in molecules or small to medium size with a high degree of accuracy.

For example, $CONTRL SCFTYP=ROHF MAXIT=30 $END, which specifies that the SCF part of the code should do a restricted open-shell Hartree–Fock (ROHF) calculation and quit if the result does not converge in 30 iterations.