The official homepage for a not-for-profit, tax-exempt, educational and cultural arts organization which is dedicated to the sharing of paperfolding in America and around the world, which offers resources including a current events calendar and news, a site search engine and directory, a discussion forum, and a shopping source.

An online source for galleries of photographs and articles about original origami designs by Robert J. Lang. Site contains links to books and origami instructions and articles about the connections between origami, mathematics, and engineering, including several of Lang's own origami-engineering projects.

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