At the International Electrotechnical and Computer Science Conference ERK 2020, we organized section CS.1 Computational intelligence. The event was held on September 21–22, 2020 in Congress Center Bernardin, Portorož, Slovenia. The conference was organized by the IEEE Slovenia Section together with the Faculty of Electrical Engineering University of Ljubljana and other Slovenian professional societies. The Conference was bilingual, with presentations in English and Slovenian.