Nice! Some readers may wish to also check out the built-in graphing calculator of The vOICe Learning Edition, toggled on and off by function key F8. Its functions are described on the web page at the URL http://www.seeingwithsound.com/winmath.htm Whatever is not covered by the calculator functions may be covered by screen sonification of the graph windows of powerful math packages like Mathematica and Matlab. Best wishes, Peter Meijer Seeing with Sound - The vOICe http://www.seeingwithsound.com/winvoice.htm