Platform by Clarivate Analytics (formerly Thomson Reuters, originally ISI - Institute for Scientific Information), which brings together various citation databases. It contains approximately 1.4 billion bibliographic references and abstracts from journals, books and conference proceedings, with multidisciplinary coverage (sciences, social sciences, arts and humanities). Integrated tools include EndNote (for bibliographic citation management), ResearcherID (for unique author identification) and JCR - Journal Citation Reports (for calculating the Impact Factor of journals, etc.). The current subscription includes access to the main databases as well as the MEDLINE bibliographic database, compiled by the U.S. National Library of Medicine (NLM), which indexes citations and abstracts from articles published in the leading biomedical journals.