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In previous years, both SOSP, held in the odd years, and the SIGOPS European Workshop, held in even years, have tended to focus on operating systems in the small. There were many papers on microkernels, nanokernels, and picokernels. As a consequence, some people were beginning to get the feeling that SIGOPS was in a rut, looking only inward instead of outward.With the enormous popularity of the World Wide Web in the past several years, it is becoming increasingly apparent that a system like the Web brings up many traditional operating systems issues (e.g., naming, communication, and replication), as well as new ones (e.g., code and data mobility, scaling to a billion users, and global resource management). In an attempt to redirect SIGOPS towards this new and challenging frontier, we have selected "Systems Support for Worldwide Applications" as the theme of this workshop, perhaps as a bit of an experiment.Although some people were a little nervous about such a change of course, the experiment was a great success. Seventy-six papers, from 19 countries, were submitted, nearly all of them on the workshop theme. This represents an increase of more than 40 percent over the Sixth European Workshop. Each paper was read by at least five reviewers and judged not only on content, but on relevance to the theme. Of these papers, 43 were selected for inclusion in this Proceedings. Of these 43 papers, 21 were selected for oral presentation at the workshop, in order to leave plenty of time for discussion, a panel, a debate, and a special summary session.