  Mid-rapidity open charm spectra from direct reconstruction of
$D^{0}$($\bar{D^0}$)$\to K^{\mp}\pi^{\pm}$ in d+Au collisions and indirect
electron/positron measurements via charm semileptonic decays in p+p and d+Au
collisions at \srt = 200 GeV are reported. The $D^{0}$($\bar{D^0}$) spectrum
covers a transverse momentum ($p_T$) range of 0.1 $<p_T<$ 3 \GeVc whereas the
electron spectra cover a range of 1 $<p_T<$ 4 GeV/$c$. The electron spectra
show approximate binary collision scaling between p+p and d+Au collisions. From
these two independent analyses, the differential cross section per
nucleon-nucleon binary interaction at mid-rapidity for open charm production
from d+Au collisions at RHIC is $d\sigma^{NN}_{c\bar{c}}/dy$=0.30$\pm$0.04
(stat.)$\pm$0.09(syst.) mb. The results are compared to theoretical
calculations. Implications for charmoniumm results in A+A collisions are
discussed.
