Invenio: A Modern Digital Library System for Grey Literature

Grey literature has historically played a key role for researchers in the field of High- Energy Physics (HEP). Consequently CERN (European Organization for Nuclear Re- search) as the world's largest particle physics laboratory has always been facing the challenge of distributing and archiving grey material. Invenio, an open-source reposi- tory software, has been developed as part of CERN's institutional repository strategy to answer these needs