Academic

Elsevier’s abstract and citation database — the largest curated index of peer-reviewed literature.

The APA’s definitive index of psychology and behavioral science.

The home of gold-standard systematic reviews.

The core literature of electrical engineering and computing.

The full record of computing research.

The deep archive of the humanities and social sciences.

Current humanities and social-science scholarship, journals and books.

The historical archive of law.

The American Economic Association’s index of economics.

Mathematical Reviews, and the map of mathematics.