A mysterious new application
Mathcad (originally written MathCAD) is desktop software for performing and documenting engineering and scientific calculations. First introduced in 1986 on MS-DOS, it was the first to introduce live editing of typeset mathematical notation, combined with its automatic computation. It was also the first to automatically compute and check consistency of engineering units such as the International system of units(SI). Both are important contributions to software technology. Mathcad today includes some of the capabilities of a computer algebra system somewhat similar to Mathematica or Maple. Mathcad nonetheless remains oriented towards ease of use and numerical engineering applications. Mathcad was conceived and originally written by Allen Razdow (of MIT), co-founder of Mathsoft which is now part of Parametric Technology Corporation.
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An excellent application for performing mathematical calculations. If there were only an similiar application for Ubuntu....