Transverse momentum (or QT) resummation is a
powerful method to predict differential distributions of elementary
particles in quantum chromodynamics. Its main features and differences
from Monte-Carlo showering methods are discussed in the brief overview
of resummation theory. Our group is actively involved in the
development of transverse momentum resummation methods in essential
collider processes. Details can be found at
http://hep.pa.msu.edu/resum.