Digital Cognitive Technologies is an interdisciplinary book which assesses the socio-technical stakes of Information and Communication Technologies (ICTs), which are at the core of the "Knowledge Society." This book addresses eight major issues, analyzed by authors writing from a Human and Social Science and a Science and Technology perspective. The contributions seek to explore whether and how ICTs are changing our perception of time, space, social structures and networks, document writing and dissemination, sense-making and interpretation, cooperation, politics, and the dynamics of collective activity (socio-informatics).