This work examines the governance of large technical systems (LTS) at firm, imdustry and state levels and the interactions between the systems and society. In particular, international contributors explore the implications of major technological , economic and social changes during the last twenty years for traditional forms of LTS governance. Their research is centred around the following themes:* traditional forms of governance* new regulatory challenges* the governability of complex technologies* conceptual issues related to the governance of inter-organizational networks