Thesetransactions publish research in computer-based methods of computationalcollective
intelligence (CCI) and their applications in a wide range of fieldssuch as the semantic Web
social networks and multi-agent systems. TCCIstrives to cover new methodological theoretical
and practical aspects of CCIunderstood as the form of intelligence that emerges from the
collaboration andcompetition of many individuals (artificial and or natural). The application
ofmultiple computational intelligence technologies such as fuzzy systems evolutionary
computation neural systems consensus theory etc. aims tosupport human and other collective
intelligence and to create new forms of CCIin natural and or artificial systems. This
twenty-first issue contains 7 carefullyselected and revised contributions.
