This seminar offers an overview of different IS architectures that highlights the challenges inherent in recent major development. From mobile terminals to the Cloud to SOA architectures, everything needed for ISs is presented. In all of its aspects, the strategy of upgrading the IS's technical architecture has become a major common theme, which generally involves a planning and streamlining approach. The resilience of the future IS will be more dependent on its flexibility than on the intrinsic quality of its components.