  Heavy quark productions in high energy polarized scatterings are reviewed
from a personal point of view. After mentioning why heavy quark physics is so
interesting, I concentrate on two rather specific subjects: (1) polarized
$\Lambda_{c}^{+}$ productions in deep inelastic $\ell p$ scatterings and (2)
$\psi^{\prime}$ productions in polarized $pp$ collisions. The first one is an
interesting process for extracting the polarized gluon in the proton and the
second one may give another test of the color-octet model of heavy quarkonium
productions in high energy collisions.
