OneStone Math for the PocketPC, is a powerful, innovative calculus program designed for educators and students that uses the OpenGL ES API to create stunning 3D graphics on standard Pocket PCs. It includes tools for evaluating integrals, derivatives, and performing 2 and 3D vector math, provides the standard Windows features like the ability to save and open files, and offers a tightly focused feature set so users can concentrate on the insights the program provides, rather than struggling with calculator manuals or device-specific behaviors