[The reference bookreviews and presents systematically the use of Internet in administration and politics. A process-oriented layer model defines the options of exchange and participation forall 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 reference bookreviews and presents systematically the use of Internet in administration and politics. A process-oriented layer model defines the options of exchange and participation forall claim groups covering these topics: eAssistance, eProcurement, eService, eContracting, eSettlement, eCollaboration, eDemocracy, and eCommunity. Case studies show practical applications in industry, administration and research. ]