The DØ experiment operated at the Fermilab Tevatron Collider for two decades before shutting down in 2011 when the LHC turned on. Important legacy measurements included the discovery of the top quark and studies of the strong interaction, electroweak boson properties, and the physics of hadrons containing heavy quarks. The searches for the Higgs boson and evidence for physics beyond the standard Model established many of the methods later employed by the higher energy LHC. Since the end of data taking, DØ has capitalized upon the more benign operating conditions and the proton-antiproton initial state to add important new understanding of the electroweak interaction and the structure of hadrons containing more than the minimum number of quarks. DØ physics results can be found here.