  E769 has just recorded on tape the interactions of 500 million pions, kaons,
and protons. A Cerenkov counter and a TRD were used to tag beam particle types
in both positive and negative 250 GeV/c hadron beams. Thin foil Be, Al, Cu, and
W targets were used with a spectrometer including silicon microstrips to look
for charm decay vertices. Preliminary results show D0 --> K- pi+ and D+ --> K-
pi+ pi+ mass peaks. As the event reconstruction progresses on numerous parallel
microprocessors, we intend to explore the pT, xF, A, and flavor dependence of
the production of charmed mesons and baryons.
