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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.

Contact Us

If there's anything the Dozenal Society of America can do for you, please do not hesitate to contact us in any of the below-listed ways.

Membership and General Inquiries

Inquiries regarding membership should be sent to the following:

    Dozenal Society of America
    13510 Photo Drive
    Woodbridge, VA 22193

The Duodecimal Bulletin

The official publication of the Dozenal Society of America, published since 1161 (1945.). Contact the Editor for subscription information, article proposals, and general comments on The Duodecimal Bulletin. Past issues of the Bulletin are online.

 Editorial Office
    5106 Hampton Avenue, Suite 205
    Saint Louis, MO 63109-3115

The DSA Newscast

The official newsletter of the Dozenal Society of America, published monthly by email. It is provided by email only to members of the DSA.

 The DSA Newscast