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Web''s most extensive Mathematical resource [Wolfram Mathworld] "It is web''s most extensive mathematical resource, provided as a free service to the world''s mathematics and internet communities as part of a commitment to education and educational outreach by Wolfram Research, makers of Mathematica.It serves as a clearinghouse for new mathematical discoveries that are routinely contributed by researchers." (LOADB)
Wellcome Images "Wellcome Images is one of the world's richest and most unique collections, with themes ranging from medical and social history to contemporary healthcare and biomedical science. "
Wellcome Images "Wellcome Images is one of the world's richest and most unique collections, with themes ranging from medical and social history to contemporary healthcare and biomedical science." Not all images are free to re-use.
WGBH Open Vault "... provides online access to unique and historically important content produced by the public television and radio station WGBH."
Wiley Open Access Journals "Wiley Open Access publishes authoritative peer reviewed open access journals across many research disciplines."
Wolfram Alpha Computational Knowledge Engine "Answer questions; do math; instantly get facts, calculators, unit conversions, and real-time quantitative data and statistics; create plots and visualizations; and access vast scientific, technical, chemical, medical, health, business, financial, weather, geographic, dictionary, calendar, reference, and general knowledge�and much more." CSULB
World Bank Open Data "Free and open access to global development data. This site is designed to make World Bank data easy to find, download, and use. All of the data found here can be used free of charge with minimal restrictions."
World Digital Library Over 15,000 digitized manuscripts, photos, books, and more covering World History and other subjects in the Social Sciences.
World Factbook The Central Intelligence Agencies source for national-level information on countries
World Intellectual Property Organization (WIPO) "File, manage or search patents, trademarks, designs and appellations of origin. Search technology, terminology and brand-related information in our free global databases. Download our other reference materials: publications, statistics, economic studies and more."