The manual has more info...
PS: Your output came from Gamess-US, rather than Firefly. Syntax and commands are very similar in both programs, but some Firefly advice in these pages will NOT work with Gamess-US.
Give Firefly a try: DFT is usually faster in Firefly, MP2 is dramatically faster and XMCQDPT2 is only available in FF. Nowadays, I only use Gamess-US for coupled-cluster computations (which are absent in FF). QM/MM is possible in Gamess-US using the $QUANPOL card, and that is the second kind of computations not easily available in standard FF presently.