The twelve number is mathematically Highly Composite, Panarithmic, Niven, Oblong, Pell and Sublime. Dozecal is an educational RPN calculator to promote the use of Base Twelve in math and science. The usual math functions are available in both DUODECIMAL and DECIMAL modes. Conversion is automatically made when switching from one mode to the other one. Trigonometric operations uses DEGREE as unit of measure. Disclaimer: results and precision may occasionally be incorrect. Should you report them at [email protected], and the author will be happy to fix !