This book tries to determine what ICT developments in public administration of the last 10-15 years have been. As point of departure we choose the speed of the succession of theoretical approaches represented by the 'phases of theories' which appeared since 1998. Three different 'mini-theories' are explored: e-Government, i-Government and m-Government. The concepts which form the core and the basic content of the three mini-theories emerge from different competing perspectives.