  We present several results on hadronic D meson decays. We report on results
from the scan of the energy region from 3970 MeV to 4260 MeV, which was used to
determine an optimal energy to carry out the D_s physics program of CLEO-c.
Improved measurements of inclusive and exclusive D and D_s branching fractions
are presented. We also show results on Dalitz analyses of D^+-->pi^+pi^-pi^+
using CLEO-c data and D^0--> K^+K^-pi^0 using CLEO III data.
