We report results of three searches for scalar top quark.  Two of
the searches look for direct production of scalar top quart followed by the
decay of the scalar quark to charm quark and nuetralino or bottom and
chargino.  The third search looks for top quark decaying to scalar top and
neutralino followed by the decay of scalar top to bottom quark and neutralino.
We find no evidence for the presence of scalar top quark in any of the
searches.  Therefore, depending on the search we set limits on the production
cross-section, BR(t -> t-bar_1 + chi-bar^0_1), or m_i vs. m_{chi-bar^0_1}.