New Sliderule Design: Sliderules are in many ways as powerful as scientific calculators, capable of applying several functions and inverse functions. My idea is to have a paper-thin kind, formed with a opaque "back" and a transparent "window", with the same or similar functions. Functions can be applied by lining up the appropriate scales (rather than with a slider), and because the two can be disconnected, one can combine ideas from sectors for trigonometric functions. Here is C code to generate a Postscript file to be printed on paper and transparency. More scales/functions need to be added.