Covers: current. The online successor to McGraw-Hill Encyclopedia of Science & Technology, including recent research developments, biographies, data, tables, news references, illustrations and related links.

A general encyclopedia with special features such as country profiles and comparisons, world atlas, timelines, and the Merriam-Webster dictionary and thesaurus.

Provides the complete text of the OED's twenty-volume Second Edition and three-volume Additions Series, together with the continually updated third edition. New entries are published each quarter, Search by headword, words in definition, parts of speech, or keywords, authors, or works for quotations. Features include the ability to browse by category, such as archaic words, to browse by timeline, and the Historical Thesaurus, a taxonomic classification of the majority of senses and headwords.

Presents "facts on the properties, manufacturing, and uses of chemicals and materials, processes, and engineering principles, coupled with insights into current research, emerging technologies and economic aspects. Environmental and health concerns are also addressed."