Top-quark physics at colliders

Results are reviewed which were obtained within the project Top-quark physics at colliders. These include QCD and weak-interaction corrections to hadronic production, determinations of the the top-quark mass, predictions of the charge asymmetry and spin correlations, NLO QCD corrections to hadronic -jet production, and partial results for hadronic t-channel single-top production at NNLO QCD. In addition, some methodical developments made in this project are outlined, which are relevant for NLO and NNLO QCD calculations.