  CP-violating asymmetries in the processes e+e- -> t tbar and gamma gamma ->
ttbar can provide information about CP-violating couplings of the top quark,
whose presence would signal physics beyond the standard model. Work on studies
of different asymmetries has been described. Special emphasis has been laid on
asymmetries in charged lepton distributions arising from top decay. The effect
of longitudinal beam polarization has been discussed. Limits possible on the
electric dipole moment of the top quark from different angular asymmetries have
been obtained.
