  We study the minimal supersymmetric standard model derived from $Z_N \times
Z_M$ orbifold models. Moduli dependent threshold corrections of the gauge
couplings are investigated to explain the measured values of the coupling
constants. Also we study Yukawa couplings of the models. We find that the $Z_2
\times Z_6'$, $Z_2\times Z_6$, $Z_3 \times Z_6$ and $Z_6 \times Z_6$ orbifold
models have the possibility to derive Yukawa couplings for the second and third
generations as well as the measured gauge coupling constants. Allowed models
are shown explicitly by combinations of modular weights for the matter fields.
