Recent measurements of the inclusive jet cross section, dijet cross
section, dijet invariant mass distributions and strong coupling constant at
TEVATRON, HERA and LEP colliders are presented in this paper.  The comparisons
with NLO perturbative QCD predictions are shown.  In general consistency with
QCD predictions is observed for a variety of processes and energy ranges.  The
observed discrepancies can be accommodated by the modifications of parton
distribution functions.