Web of Science is an online citation index provided by Thomson Reuters that covers over 11,000 journals across science, social science, arts, and humanities. It provides access to multiple databases and covers peer-reviewed literature, citations, and references dating back to 1900. Web of Science consists of several databases including the Science Citation Index, Social Sciences Citation Index, and Arts & Humanities Citation Index that cover over 7,000, 2,400, and 1,400 journals respectively across various disciplines.