  We have made a precise measurement of the inclusive jet cross section at 1800
GeV. The result is based on an integrated luminosity of 92 pb**-1 collected at
the Fermilab Tevatron pbarp Collider with the DO detector. The measurement is
reported as a function of jet transverse energy (60 GeV < ET < 500 GeV), and in
the pseudorapidity intervals |eta|<0.5 and 0.1<eta<0.7. A preliminary
measurement of the pseudorapidity dependence of inclusive jet production
(eta<1.5) is also discussed. The results are in good agreement with predictions
from next-to-leading order (NLO) quantum chromodynamics (QCD). D\O has also
determined the ratio of jet cross sections at $\sqrt{s}$=630 GeV and
$\sqrt{s}$=1800 GeV ($|\eta|\leq 0.5$). This preliminary measurement differs
from NLO QCD predictions.
