Scopus. Elsevier.http://www.elsevier.com/online-tools/scopus.

A very complimentary review by –J. N. Jeffryes, University of Minnesota

“Scopus’s nearest competitor is Web of Science http://thomsonreuters.com/thomson-reuters-web-of-science/ (CH, Jan’11, 48-2436), and the two tools remain somewhat complementary.  For post-1996 information, Scopus comes off as the more impressive of the two with its advanced citation analysis visualizations, wider inclusion of conference papers, and adoption of alternative impact metrics.  Because the citation counts and h index calculations go back only to 1996, Web of Science has the historical edge.  In the areas of interface design and record readability, Scopus is the stronger tool.  It provides an intuitive search format to explore an impressively broad base of research; if the depth of coverage were expanded (or as 1996 becomes more distant), this tool would become even more valuable.  Even as it is today, it is a very valuable resource for academic and professional libraries. Summing Up: Highly recommended. Upper-division undergraduates and above”

The complete review is here:  http://www.cro3.org/content/52/05/52-2504.full