The book begins by addressing an investigation conducted in a current EU project wherein it was made evident that the successful interplay between institutions and technology makes the digitization of government services possible. The authors present the results of a systematic literature mapping that reviews the adoption level of enterprise architectures in local e-governments. These results will indicate where and how enterprise architectures have been used, which frameworks are used for their definition, and possible challenges and opportunities for their utilization in the local e-government context. An empirical evaluation that combines two different Multi-criteria decision making techniques, called AHP and TOPSIS, is provided, along with steps that must be taken to apply these theories in comparing e-government sites. A report is included on Korea's electronic government policies during the Roh Moo-hyun administration. President Roh Moo-hyun was directly engaged as a developer in the e-government development team, designing document management and task management processes with experts. The fact that the president of a country directly participated in the development of the e-government system remains a rare case in the world. Additionally, citizens' behavior is investigated in conjunction with the role of "Citizen Service Centers" in e-government adoption in Greece, with the goal of contributing to the understanding of the users' motivations.