These transactions publish research in computer-based methods of computational collective intelligence (CCI) and their applications in a wide range of fields such as performance optimization in IoT, big data, reliability, privacy, security, service selection, QoS and machine learning. This thirty-fourth issue contains 12 selected papers which present new findings and innovative methodologies as well as discuss issues and challenges in the field of collective intelligence in group decision making with special emphasize given to voting theory, power indices and graphs while addressing elections, social choices, IoT and allocation algorithms.