GENNBO 6.0W is a fully-functional PC-Windows version of the general stand-alone GENNBO version of NBO 6.0. With this program, NBO analysis can be conveniently performed at the desktop (or repeated for many alternative $NBO keylist options) by using the "archive" (.47) file generated from a previous ESS/NBO run, without the necessity of re-calculating the wavefunction and molecular integrals. For further description of usage and ordering information, see the NBO manual (Sec. B.7) and the NBO website description and order form.