International Workshop on Privacy in the Cloud/Edge/IoT World (PCEIoT 2021).- International Workshop on Processes, methods and tools towards RE-Silient cities and cultural heritage prone to SOD and ROD disasters (RES 2021).- International Workshop on Risk, resilience and sustainability in the efficient management of water resources: approaches, tools, methodologies and multidisciplinary integrated applications (RRS 2021).- International Workshop on Scientific Computing Infrastructure (SCI 2021).- International Workshop on Smart Cities and User Data Management (SCIDAM 2021).