Description The vision of the ARCOMEM project is to leverage the Wisdom of the Crowds for content appraisal, selection and preservation, so that archives reflect collective memory and social content perceptionARCOMEM is about memory institutions like archives, museums, and libraries in the age of the Social Web. Memory institutions are more important now than ever: as we face greater economic and environmental challenges we need our understanding of the past to help us navigate to a sustainable future. This is a core function of democracies, but this function faces stiff new challenges in face of the Social Web, and of the radical changes in information creation, communication and citizen involvement that currently characterise our information society (e.g., there are now more social network hits than Google searches). Social media are becoming more and more pervasive in all areas of life. In the UK, for example, it is now not unknown for a government minister to answer a parliamentary question using Twitter, and this material is both ephemeral and highly contextualised, making it increasingly difficult for a political archivist to decide what to preserve.This new world challenges the relevance and power of our memory institutions. To respond to these challenges, ARCOMEM's aim is to:help transform archives into collective memories that are more tightly integrated withtheir community of usersexploit Social Web and the wisdom of crowds to make Web archiving a more selective and meaning-based processTo do this, the project team will provide innovative tools for archivists to help exploit the new media and make our organisational memories richer and more relevant. This will be addressed in three ways:First, it will be demonstrated how social media can help archivists select material for inclusion, providing content appraisal via the social web.Second, it will be shown how social media mining can enrich archives, moving towards structured preservation around semantic categories.Third, reserach will explore social, community and user-based archive creation methods.As results of this activity the outcomes of the ARCOMEM project will include:innovative models and tools for Social Web driven content appraisal and selection, and intelligent content acquisitionnovel methods for Social Web analysis, Web crawling and mining, event and topicdetection and consolidation, and multimedia content miningreusable components for archive enrichment and contextualizationtwo complementary example applications, the first for media-related Web archives and the second for political archivesa standards-oriented ARCOMEM demonstration systemThe impact of these outcomes will be to a) reduce the risk of losing irreplaceable ephemeral webinformation, b) facilitate cost-efficient and effective archive creation, and c) support the creation of more valuable archives. This has the potential to strengthen our democracies' understanding of the past, in order to better direct our present towards viable and sustainable modes of living, and thus to make a contribution to the future of Europe and beyond.