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Wolfram Demonstrations Project
Stephen Wolfram, scientist and founder of Wolfram Research, conceived the Wolfram Demonstrations Project as a way to bring computational exploration to the widest possible audience. It is an open-code resource that uses dynamic computation to illuminate concepts in science, technology, mathematics, and a remarkable range of other fields. Wolfram's goal is to encourage people of all ages and backgrounds to embrace computational thinking as a way to better analyze and understand the world around them.
Digital Library of Mathematical Functions (from the National Institute of Standards and Technology)
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