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Government Information Sources
A comprehensive web portal to government publications, agencies, and other information sources. Search or browse by topic.
NASA Scientific and Technical Information
Search NASA's collection of technical reports, plus sets of facts, analyses, and conclusions related to research and development efforts.
NIST Physical Reference Data
From the National Institute of Standards and Technology. Provides values for physical constants, as well as spectra, x-ray and gamma ray data, nuclear physics data, condensed matter physics data, and more.
Datasets & Statistics
Data Citation Index
Provides a single point of access to research data, including data sets, tables and figures, and published studies, from repositories across disciplines and around the world.
Data-Planet Ready Reference
Find charts and graphs illustrating statistical trends drawn from a huge array of sources.
Data-Planet Statistical Datasets
Access statistical datasets from a wide variety of organizations and agencies, and create your own unique charts and graphs directly from Data-Planet's interface.
The Collected Papers of Albert Einstein
The site presents all 13 volumes published to date by the editors of the Einstein Papers Project, covering the writings and correspondence of Albert Einstein. The volumes are presented in the original language version with in-depth English language annotation, plus an English language translation is available for most documents.
The Feynman Lectures on Physics
Access the complete text of the legendary Feynman lectures online.