The newly developed 2-electron integrals/fock matrix build/integral transformation modules (fastints) are intended to speed up direct HF/DFT/CIS/ TDHF/TDDFT/MCSCF runs. ... For very large molecular systems and HF/DFT, the new code can be used in conjuction with the linear scaling QFMM code, see this link for additional information on QFMM implementation in the PC GAMESS/Firefly. ... GENCON=.TRUE./ ... Spherical Basis Functions . ... New MP2 gradient code documentation . ...