The academic alternative to Wikipedia! Provides access to nearly 500 encyclopedias and dictionaries. Search by concept map. Includes thousands of searchable images.
Comprehensive index to scholarly journals and general periodicals in all subject and interdisciplinary areas, including full text. Coverage prior to 1990 is sparse.
Indexes periodicals on astronomy, biology, chemistry, earth sciences, math, medicine, and physics, 1983 to present. Earlham subscribes to almost all of the content, either as online full text or as print.