  A review on the theoretical aspects and the experimental results of polarized
deep inelastic scattering and of other hard scattering processes is presented.
The following items are discussed: longitudinally polarized structure
functions, results from the SLAC and CERN polarization experiments, the QCD
interpretation and the LO and NLO Q2-evolution of g1, the role of the polarized
gluon density, the expectations for x-->0, sum rules, the first moment of the
polarized structure function, the parametrizations of polarized parton
densities, polarized jet, heavy quark and direct photon production, DIS
semi-inclusive asymmetries and elastic neutrino-proton scattering, single and
double spin asymmetries, structure functions for higher spin hadrons and
nuclei, nonperturbative approaches, the transverse structure function g2,
chiral-odd 'transversity' distributions.
