Includes both encyclopedias and dictionaries as well as more specialized titles from History and other disciplines.

Specialized online encyclopedias in a variety of fields.

Biographical information on more than one million notable people throughout history, around the world, and across many fields of study.

Core reference work in the history of science, includes lengthy biographical essays about deceased natural scientists and mathematicians from all countries and historical periods.

Covers the period from the Renaissance to the early twenty-first century, including all disciplines, concepts, and methodologies and philosophies.

Over 1400 entries about America's political, diplomatic, military, social, cultural, and intellectual history; includes science, technology, and medicine; the arts; and religion.

Over 130 articles about the functions and effects of science and technology in society and culture.