Learn more about the Wikimedia Foundation, dedicated to the development and distribution of free content, including its sites Wikipedia, Wikiquote, Wikisource, Wikibooks, and Wiktionary. - [Read more]

Searchable directory, arranged by field, of equations, constants, symbols and SI units. Also features LaTEX utilities, software links. - [Read more]

Offers e-business solutions. Vision on user experience, information on advanced e-business, portfolio and news. - [Read more]

The public site for Oxford Reference Online - the biggest, most up-to-date, authoritative, and accessible reference work in the world. This huge resource contains almost 2 million words and phrases from Oxford's English language and bilingual dictionaries... - [Read more]

Gives general defintions, background and examples from the science fields of biology, physics, chemistry, math, and history. Includes forum boards. - [Read more]