This volume focusses on four main topics: structure functions, tests of quantum chromodynamics, physics at the highest Q2 and p2T, and high energy scattering and diffraction. Comprehensive review articles on hadronic and photon structure, lepton–parton and parton–parton physics as well as future experimental opportunities are presented, together with a special lecture on HERA's legacy after the first decade of operation.

This volume focusses on four main topics: structure functions, tests of quantum chromodynamics, physics at the highest Q2 and p2T, and high energy scattering and diffraction. Comprehensive review articles on hadronic and photon structure, lepton–parton and parton–parton physics as well as future experimental opportunities are presented, together with a special lecture on HERA's legacy after the first decade of operation.