This textbook reviews and systematically presents the use of the Internet in public administration and politics. Further, it employs a process-oriented layer model to define the opportunities for exchange and participation for all stakeholder groups, covering the following topics: eAssistance, eProcurement, eService, eContracting, eSettlement, eCollaboration, eDemocracy, and eCommunity. In turn, real-world case studies demonstrate the practical applications in industry, administration and research. The second edition of this book has been completely revised and extended, and includes several new case studies. It offers a valuable asset for students in Business, Economics and Political Sciences courses, as well as practitioners interested in emerging opportunities for digital exchange and participation in the knowledge society.