CORE (COnnecting REpositories) is an aggregation of open access content from UK and worldwide repositories and open access journals. It provides a range of services including discovery, analytics, and text mining access. The aggregated content includes metadata (24m records) and open access research outputs (about 1.8m full text items) from more than 667 repositories, from 10,351 journals in the UK and worldwide (currently 70 countries).