  The spectrum of D=4 supersymmetric Yang-Mills quantum mechanics is computed
with high accuracy in all channels of angular momentum and fermion number.
Localized and non-localized states coexists in certain channels as a
consequence of the supersymmetric interactions with flat valleys. All states
fall into well identifiable supermultiplets providing an explicit realization
of supersymmetry on the spectroscopic level. An accidental degeneracy among
some supermultiplets has been found. Regularized Witten index converges to a
time-independent constant which agrees with earlier calculations.
