Hundreds of online reference resources organized by subject.

An online tool that provides access to hundreds of background sources covering every major subject.

Authoritative information on nearly every subject, this is the online version of the Encyclopedia Britannica.

"The definitive record of the English language." Including 600,000 words from over a millennium, the OED not only defines, but provides historical context for, English words from the everyday to the arcane.

Includes practice tests and courses for GRE, GMAT, LSAT, MAT, SAT, PRAXIS, TOEFL, civil service and licensure exams, graduate school search, and more.

Encyclopedia articles about art and artists' biographies, includes images

Industry and company profiles with an emphasis on the technology industries. Also includes financial reports, stock market analysis, investment advice and more.

A collection of unbiased reports covering a variety of social & public policy issues, a good first stop for background information on a topic

"The most comprehensive collection of scholarship available online to focus on the lives and events which have shaped African American and African history and culture."

Online resource for research on literary topics, authors, and their works. Coverage includes all genres and disciplines, all time periods, and all regions of the world.

Composer, performer and librettist biographies, encyclopedic coverage of music genre and form, works lists.

Richard Taruskin's classic and exhaustive study of the Western classical tradition, from the earliest musical notation to the late twentieth century.

Each entry is maintained and kept up to date by an expert or group of experts in the field.

Online edition of the standard diagnostic manual in psychology and psychiatry, for use in educational, clinical, and research settings.

Health reference information from personal health information sources and academic journals.

Quick lookup resource for brief definitions of medical terms and concepts.

Religion dictionaries.

McGraw-Hill online encyclopedia covering natural sciences, engineering, and related topics. Includes images, videos, periodic table lookup and more.

Core handbook for chemistry and physical sciences. Constants, symbols, elemental properties, MSDSes, and more.

Look up chemical reactions and substances in this comprehensive encyclopedia. Includes structure and reaction searching!

A timely, comprehensive and authoritative work, which describes many aspects of this young and fascinating discipline from its inception to the present day.

Comprehensive guide to the essentials of evolutionary biology. From Oxford University Press.

Comprehensive and authoritative reference work on the area of biology that is revolutionizing medicine.

Articles on chemical substances, covering properties, manufacturing, and use. Great chemical engineering resource with information on environmental and health issues as well.

This sixth edition of the McGraw-Hill Dictionary of Scientific and Technical Terms continues to serve the needs of both the scientific community and the general reader for high quality information, and to contribute to scientific education and technological literacy.