Introduction; K.A. Zweig.- Towards a Principle of Socio-Technical Interactions - Embracing Cultural Issues of Enterprise Culture through a Concept of Enterprise Activities; S. Bittmann.- The Human Factor in Computer Science and How to Teach Students to Care: An Experience Report; J. Siegmund, S. Apel.- Socially-Aware Traffic Management; M. Seufert et al.- The Social Dimension of Information Ranking: A Discussion of Research Challenges and Approaches; I. Scholtes et al.- Using weighted interaction metrics for link prediction in a large online social network; O. Posegga et al.- Integrated Modeling and Evolution of Social Software; A. Poetzsch-Heffter et al.- Social Network Analysis in the Enterprise: Challenges and Opportunities; V. Burger et al.- Assessing the Structural Fluidity of Virtual Organizations and its Effects; S. P. Goggins, G. Valetto.- Anonymity, Immediacy and Electoral Delegation in Socio-Technical Computer Systems; J. Botev.- Towards Acceptance of Socio-technical Systems? An Emphasis on the Requirements Phase; J. Doerr.- Morals, IT-Structures, and Society; W. Lenski.