This report analyses how OSCARS and related Horizon Europe (HE) projects support and collaborate with the EOSC Science Clusters. It focuses on mapping existing support activities, understanding how they are implemented across the ecosystem, and identifying areas where coordination and collaboration can be strengthened. Support activities are a central element in enabling the uptake of EOSC services and practices. They provide the mechanisms through which users access infrastructures, projects align with common frameworks, and communities adopt FAIR and Open Science principles. These activities are developed across multiple HE projects and initiatives, often in parallel and across different domains. In this context, the report aims to provide a consolidated view of the current support landscape, highlighting how different projects contribute to the same objectives, where synergies already exist, and where further alignment could improve effectiveness. It covers training, technical integration, FAIR and interoperability guidance, policy alignment, and user support, and how these activities contribute to the uptake and integration of EOSC services and practices. The deliverable examines how support is currently provided across the ecosystem, including training, technical integration, FAIR and interoperability guidance, policy alignment, and user support, and how these activities contribute to the uptake and integration of EOSC services and practices. Beyond identifying existing activities, the deliverable analyses how support is organised in practice, highlighting overlaps, complementarities, and differences in approach across projects and clusters. It also identifies areas where coordination remains limited and where stronger alignment could improve efficiency and impact. In this context, D3.3 aims to clarify: how support activities are distributed across projects and domains how they connect to Science Clusters and their infrastructures and where opportunities exist to strengthen collaboration and coherence across the EOSC ecosystem The overall objective is not to provide an exhaustive inventory, but to establish a clear picture of the current support landscape and to inform more coordinated and effective approaches in future EOSC developments.
Hienola et al. (Wed,) studied this question.