The "The Ranking Web of World repositories" is an initiative of the Cybermetrics Lab, a research group belonging to the Consejo Superior de Investigaciones Científicas (CSIC), the largest public research body in Spain. The aim of this Ranking is to support Open Access initiatives and therefore the free access to scientific publications in an electronic form and to other academic material. The web indicators are used here to measure the global visibility and impact of the scientific repositories. Using as basis the data from the Registry of Open Access Repositories (ROAR) and The Directory of Open Access Repositories (OpendOAR) we have compiled a list of repositories with an autonomous web domain or subdomain