  We present threshold enhanced QCD corrections to inclusive processes such as
Deep inelastic scattering, Drell-Yan process and Higgs productions through
gluon fusion and bottom quark annihilation processes using the resummed cross
sections. The resummed cross sections are derived using renormalisation group
invariance and mass factorisation theorem that these hard scattering cross
sections satisfy and Sudakov resummation of QCD amplitudes. We show how these
higher order threshold QCD corrections improve the theoretical predictions for
the Higgs production through gluon fusion at hadron colliders.
