Scirus

Scirus is a comprehensive science-specific search engine. Like CiteSeer and Google Scholar, it is focused on scientific information. Unlike CiteSeer, Scirus is not only for computer sciences and IT and not all of the results include full text. It also leverages its scientific search results to Scopus, an abstract and citation database covering scientific research output globally. Scirus is owned and operated by Elsevier.

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World Book Encyclopedia

The World Book Encyclopedia, published in the United States, is self-described as the "the number-one selling print encyclopedia in the world."The encyclopedia is designed to cover major areas of knowledge uniformly, however it shows particular strength in some fields. It is based inChicago, Illinois. The first edition (1917) contained eight volumes. New editions have since appeared every year except 1920, 1924, and 1932, with major revisions in 1930 (13 volumes), 1947 (18,000 illustrations), 1960 (20 volumes), and 1988.
Field Enterprises published World Book from 1944 to 1984. World Book, Inc., is a subsidiary of the Scott Fetzer Company, which in turn is aBerkshire Hathaway subsidiary.