A CAD program with a long history from Robo Systems International, Inc., Newtown, PA (www.robosys.com) that began running under DOS in the mid-1980s and includes a wide variety of features and text functions. It provides up to 256 colors and layers, has two drawing pages and a scratch pad, and can transfer data to its solid modeling program. RoboCAD is noted for its performance and ease of use and is very popular in the education market. Versions of RoboCAD are available for DOS, Windows and Macs that are PC or Windows compatible.