Repositories are an IT tool for depositing, storing and making available online the scientific output of scientific institutions (institutional repositories) or the results of research in specific scientific fields (domain-specific repositories). Repositories are used to deposit publications (mainly journal articles, book chapters, monographs, dissertations), as well as research data." (see "Directions for the development of open access to publications and scientific research results in Poland"). Repositories are a tool for scientific communication for the ongoing exchange of ideas and results of research work.

• OpenDOAR
• ROAR
• Disciplinary Repositories
• Open Archives
• arXiv.org
• CEON

Global research data registries:

• re3data.org
• Open Access Directory Data Repositories
• Zenodo
• OpenAIRE
• RepOD

Journals registry:

• DOAJ

Books registry:

• DOAB