System Requirments: Adobe Acrobat Reader, Microsoft Word 2003. This CD-ROM Includes Works of "Galileo Galilei".He Was a Tuscan (Italian) Physicist, Mathematician, Astronomer, and Philosopher Who Played a Major Role in the Scientific Revolution. His Achievements Includes Improvements to the Telescope and Consequent Astronomical Observations, and Support for Copernicanism. Galileo has been Called the "Father of Modern Observational Astronomy", the "Father of Modern Physics",and the Father of Modern Science. These Works As Follow:Dialogues Concerning Two Sciences/ Letter to Grand Duchess Christina of Tuscany