The seven volumes LNCS 12249-12255 constitute the refereed proceedings of the 20th International Conference on Computational Science and Its Applications, ICCSA 2020, held in Cagliari, Italy, in July 2020. Due to COVID-19 pandemic the conference was organized in an online event.Computational Science is the main pillar of most of the present research, industrial and commercial applications, and plays a unique role in exploiting ICT innovative technologies.
The 466 full papers and 32 short papers presented were carefully reviewed and selected from 1450 submissions. Apart from the general track, ICCSA 2020 also include 52 workshops, in various areas of computational sciences, ranging from computational science technologies, to specific areas of computational sciences, such as software engineering, security, machine learning and artificial intelligence, blockchain technologies, and of applications in many fields.

International Workshop on Geomatics in Forestry and Agriculture: new Advances and Perspectives (GeoForAgr 2020).- International Workshop on Collective, Massive and Evolutionary Systems (IWCES 2020).- International Workshop on Large Scale Computational Science (LSCS 2020) International Workshop on Land Use Monitoring for Sustanability (LUMS 2020).- International Workshop on Machine Learning for Space and Earth Observation Data (MALSEOD 2020).- International Workshop on Building Multi-dimensional Models for Assessing Complex Environmental Systems (MES 2020).- International Workshop on Ecosystem Services: Nature's Contribution to People in Practice. Assessment Frameworks, Models,Mapping, and Implications (NC2P 2020).- International Workshop on Open Knowledge for Socio-economic Development (OKSED 2020).