The reference book reviews and presents systematically the use of Internet in administration and politics. A process-oriented layer model defines the options of exchange and participation for all claim groups covering these topics: eAssistance, eProcurement, eService, eContracting, eSettlement, eCollaboration, eDemocracy, and eCommunity. Case studies show practical applications in industry, administration and research. The book is well suited for students in Business, Economics and Political Sciences courses as well as for practitioners interested in the opportunities of digital exchange and participation in the knowledge society.