  Most of the poorly known parameters of the Standard Model cannot be
determined without reliable calculations in nonperturbative QCD. Lattice gauge
theory provides a first-principles definition of the required functional
integrals, and hence offers ways of performing these calculations. This paper
reviews the progress in computing hadron spectra and electroweak matrix
elements needed to determine $\alpha_S$, the quark masses, and the
Cabibbo-Kobayashi-Maskawa matrix.
