arXiv is a free distribution service and an open-access archive for scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.
Web of Science (WoS) indexes leading scholarly journals, books, proceedings, and other formats. Its major subject areas include the natural and social sciences and arts and humanities with coverage back to 1900. The heart of WoS is the Web of Science Core Collection, which indexes thousands of scholarly journals by author, author affiliation, and cited reference. In addition to the Core Collection, Web of Science provides access to several regional, subject, and format-specific database.
The suite of video tutorials teach aspects of searching, analyzing results, creating a researcher profile, and more. EndNote Web, the bibliographic management tool, is integrated into WoS.