OpenDoer is an authoritative directory of academic open access repositories. It contains digital collections that preserve and provide access to the intellectual output of an institution. Repositories provide open access to academic outputs and resources. OpenDoar offers a trusted service since each repository record is carefully reviewed and processed. Visit OpenDoar. Repositories are a key facilitator for discovering pre-print research outputs. OpenDOAR is an authoritative directory of academic open access repositories. You can browse through the list of repositories using different search options for example according to the location (country) as well as searching for repositories’ content. The underlying database has been designed to include in-depth information on each repository that can be used for search, analysis, or underpinning services. It also provides a list of upgrades and additions. Find original research papers from different institutions regarding different subjects and fields. Open this Database