  A nonvanishing value for the electric dipole moment (EDM) of the neutron is a
prominent signature for CP violation. The EDM induced by the Kobayashi-Maskawa
mechanism of the standard model (SM) has a small magnitude and its detection
will be very difficult. However, since baryon asymmetry of the universe cannot
be accounted for by the SM, there should exist some other source of CP
violation, which may generate a large magnitude for the EDM. One of the most
hopeful candidates for physics beyond the SM is the supersymmetric standard
model, which contains such sources of CP violation. This model suggests that
the EDM has a magnitude not much smaller than the present experimental bounds.
Progress in measuring the EDM provides very interesting information about
extension of the SM. ........
