The CAD 3D program made by kerm in 2002, but with a lot of new functions and bugfixes. If you aren't sure how to use it, the file include a huge walkthroug for the most imporiant parts of the program. I am sorry that there is no support for plain TI83, but that version is to come. This program have a Doors CS 6.0+ optimized Icon. Screenshots are from an older version.