The DSA is a voluntary, nonprofit educational 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.

This article by L. H. Vincent gives a refreshingly simple, yet compelling case for base twelve. Word-heavy and math-light, he lays out the dozenal system with only one small table and no embedded mathematics.