Top Cross-Sections and Single Top

This paper summarizes top quark cross-section measurements at the Tevatron and the LHC. Top quark pair production cross-sections have been measured in all decay modes by the ATLAS and CMS collaborations at the LHC and by the CDF and D0 collaborations at the Tevatron. Single top quark production has been observed at both the Tevatron and the LHC. The t -channel and associated Wt production modes have been observed at the LHC and evidence for s -channel production has been reported by the Tevatron collaborations