The 22 full papers included in this book were carefully reviewed and selected from 73 submissions. The papers have been organized in the following topical sections as follows: Advancements in methods for the broadly defined field of social computing; Online social network analysis, mining, and modeling; Large-scale social media analytics and intelligence; Trust, privacy, security, and fairness in social systems; Applied social computing applications in diverse areas such as health and finance; Governance, policy, ethical, and legal challenges of emergent social technologies.