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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.

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The DSA is a non-profit, voluntary organization; we depend on the generosity and members and well-wishers to continue our educational mission.

Remember that the DSA pays no salaries, so every penny you donate goes to furthering that mission.

Please note that the DSA is a tax-exempt organization under section 501(c)(3) of the Internal Revenue Code; as such, contributions to the Society may be tax-deductible under applicable laws.

Amount:

Of course, if you would prefer to make your donation by check, then you are still welcome to do so. Please send checks, payable to the Dozenal Society of America, to:

       Prof. Jay Schiffman
       604-36 South Washington Square, #815
       Philadelphia, PA 19106-4115

Thank you for your support! The DSA cannot do its work without you.