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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 DSA Symbology Synopsis

Title: The DSA Symbology Synopsis
Author: Michael deVlieger
Year: 11E7
Subject: A poster-sized synopsis of proposals for dozenal symbologies.

This 11" × 17" landscape-format poster summarizes numerals devised for dozenal, hexadecimal, and other bases. The DSA Symbology Synopsis brings together all symbols surveyed by Duodecimal Bulletin Vol. 4X; No. 2 and Vol. 4E; No. 1, as well as those submitted by readers and gleaned subsequently on the internet.