For three decades, Mathematica has defined the state of the art in technical computing?and provided the principal computation environment for millions of innovators, educators, students, and others around the world. Widely admired for both its technical prowess and elegant ease of use, Mathematica provides a single integrated, continually expanding system that covers the breadth and depth of technical computing?and seamlessly available in the cloud through any web browser, as well as natively on all modern desktop systems.

http://www.wolfram.com/mathematica/