The subject of the contract is to contribute to the drafting of a sound strategic European agenda for clouds for e-science and e-government in the EU. The study should, first, provide a cartography of the e-science and e-government clouds; second, identify technical, organisational and legal obstacles to pan-European e-science and e-government cloud computing services and propose solutions to them; third, determine the potential for using clouds deployed for e-science for providing e-government services and vice versa; fourth, specifically for e-science, determine estimates of the size of the cloud(s), the models for organising and operating them and the ways to leverage the purchasing power of public funders.