  The D0 detector at The Fermilab Tevatron is undergoing a major upgrade to
prepare for data taking with luminosities reaching 2 x 10^{32} cm^{-2} s^{-1}.
The upgrade includes a new central tracking array, new muon detector components
and electronic upgrades to many subsystems. The D0 upgraded detector will be
operational for RUN II in spring 2000.
