Scopus

Scopus is a huge multidisciplinary database with citations and abstracts from peer-reviewed journal literature, trade journals, books, patent records, and conference publications.  It provides tools for tracking, analyzing, and visualizing search results.

• Over 21,000 titles from 5,000 publishers worldwide
• Contains >60 million records, with the most thorough coverage from 1996 forward.
• Includes over 6.4 million conference papers from proceedings and journals.
• Updated daily 

See Using Scopus for an overview of Scopus from its publisher, Elsevier.