Pythagoras is a CAD program specifically designed for land surveyors, civil engineers and construction. Pythagoras contains all surveying calculation functions, Digital Terrain Modeling and Road Design. The powerful integration of the calculation and drawing functions makes Pythagoras easy to use and quick to learn. Pythagoras is available for MS Windows (98 - 2000 - NT - XP) and Apple Macintosh (OS X).
Source: Western Latitudes, May 1, 2005