"Covers all major areas of science, engineering, technology, as well as mathematics and the medical and health sciences, while providing a comprehensive overview of current scientific knowledge and technology...

"Explains mathematical concepts with an historical overview of the field...

An encyclopedia of mathematics from Wolfram Research...

Online encyclopedia of mathematics designed as "a project to fill the void for a central repository for mathematical knowledge on the web, with a pedagogical slant...

"Provides an understanding of commonly studied math concepts by illustrating their use in everyday life in everyday tasks, such as buying insurance, constructing a budget, reading graphs, adjusting cooking recipes or planning for retirement...

Online encyclopedia covering many areas in the sciences: chemistry, computer science, earth science, environmental science, forensic science, mathematics, physics, space and astronomy, and weather and climate...