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Dozenal Society of America
Promoting base twelve and alternative base mathematics
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The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

The Duodecimal Bulletin

The long-running official journal of the Dozenal Society of America, the Duodecimal Bulletin has been published at varying intervals since 1161 (decimal 1945).

Issues between 1161 and 11E4 are available as scanned, web-optimized pdf documents; editions subsequent to 11E4 are available as normal pdf documents (having been originally produced that way). The issues published most recently are available only for members.

Historical Summary | Pictorial Synopsis