EOSC will be Europe's virtual and trusted environment for all researchers to store, manage, analyse and re-use data for research, innovation and educational purposes. The idea of EOSC took shape in 2015, as a vision of the European Commission of a large infrastructure to support and develop Open Science and Open Innovation in Europe and beyond. EOSC will be implemented as the federation of existing research data infrastructures and a web of FAIR data and related services for science, making research data interoperable and machine-actionable following the FAIR guiding principles.