Theoretical progress in Higgs boson production and background processes is
discussed with particular emphasis on QCD corrections at and beyond
next-to-leading order as well as next-to-leading order electroweak corrections.
The residual theoretical uncertainties of the investigated processes are
estimated in detail. Moreover, recent investigations of the MSSM Higgs sector
and other extensions of the SM Higgs sector are presented. The potential of the
LHC and a high-energy linear e+e- collider for the measurement of Higgs
couplings is analyzed.Comment: 169 pages, Proceedings 3rd Les Houches Workshop: Physics at TeV
Colliders, Les Houches, France, 26 May - 6 Jun 200