  We report on the progress in work on improving precision of the standard
model theoretical predictions for the top quark pair production and decay into
six fermions at a linear collider. Two programs have been combined into a
single Monte Carlo program: 'eett6f', a MC program for e+e- -> 6f, and
'topfit', a program for electroweak radiative corrections to e+e- -> t\bar t.
The MC program is described and preliminary numerical results are shown.

High Energy Physics - Phenomenology