This book contains papers presented at the Twentieth International Colloquium on Communication, which took place in July 2006 in Erfurt, Germany. Participants addressed questions related to the practical application of communication research, as well as the interrelationships between communication theories and applications in various contexts. Two main foci for these questions were organizations as a major site of communicative practice and international contexts, which have varying communication and cultural patterns that expand the forms of communication we are acquainted with in nation-wide, single-Language contexts. The articles included in this volume address five different dimensions of applied communication: visual and spatial communication, intercultural communication, argumentation, organizational communication and health communication.