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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: Chronology

◀️ Issues: A0–ABz (120–131d) | Years: 11B7z–present (2011d–present) ▶️

The Third Generation Develops

The eleventh unquade of The Duodecimal Bulletin begins with a bang with Issue Ten Dozen, A0z (120d), also known as the “long hundred” or “twelfty”; that issue examined the possibility of using ten dozen itself as a base, in the form of alternating dozenal-on-decimal. Issue Ten Dozen One, A1z (121d), introduced Systematic Dozenal Nomenclature, a new way of providing technical words for numbers in base twelve, partly inspired by Pendlebury’s TGM prefixes, but preserving ancient classical roots; it even reconstructs uncia with the same meaning it had in Latin, “one dozenth”, but now as a technical power prefix useful in metrologies. Editor Michael deVlieger continued producing full-color, visually spectacular digital issues; then in Issue Ten Dozen Two, A2z (122d), he handed the torch to current editor John Volan, who continued the quality but using a different production process. Now that the Pitman transdecimal digits have been accepted into Unicode, with their usage nearly universal among the Dozenal Societies, John has presided over incorporating them into the Bulletin. It is difficult to say how this unquade will round out, being still only half-way through this period, but future issues are bound to be fascinating.