If you're doing anything technical, think Mathematica--not just for computation, but for modeling, simulation, visualization, development, documentation, and deployment.
Why Mathematica? Because this one integrated system delivers unprecedented workflow, coherence, reliability, and innovation. Rather than different toolkits for different jobs, Mathematica has been built ground-up for more than 20 years to deliver one vision: the ultimate technical application and environment.


Here we bring you the latest version of good ol' Mathematica
* Performance enhancements to core image-processing functions
* Right-click menu for quick image manipulation
* New tutorials, "How to" guides, and screencasts
* Thousands of new examples in the documentation
* Improved documentation search
* Integration with mathematical handwriting-recognition features of Windows 7
* Integration with the upcoming release of gridMathematica Server

- Comprehensive list of standard extra packages added to the Documentation Center
- Improvements to package documentation
- Improved options handling for MatrixForm and TableForm
- Enhanced front end stability with Manipulate containing a selected graphic
- Improved options handling for ListPlot
- Improved handling of AxesLabel and Ticks combinations
- Improved handling of numerical data without spaces in Protein Data Bank (PDB) import
- Changed winding in LightWave Object (LWO) export to better adhere to industry standards
- Improved interactivity under Linux with compositing window managers, such as Compiz
- Improved font handling on Ubuntu Hardy and Fedora Core 9

Long recognized as the world's most powerful mathematical software system,Mathematica has steadily grown in breadth and depth to become today an unparalleled platform for all forms of computation Powering innovation in research, development, and education

With thousands of original algorithms and a tightly unified overall design,Mathematica spans projects of all sizes, from simple calculator operations and educational demonstrations to large-scale systems deployment and maximum-power supercomputing .The most important advance in the 20 year history of Mathematica

Building on two decades of world-class algorithm and software development,Mathematica 7 represents a dramatic breakthrough that immensely broadens Mathematicas scope and applicability, and redefines the very way we think about computation

Made possible by Mathematica's unique symbolic architecture, Mathematica 6 introduces a sweeping unification of language and interface concepts that makes possible a new level of automation in algorithmic computation,interactive manipulation and dynamic presentation, as well as a whole new way of interacting with the world of data

Mathematica 7.0.1 fundamentally redefines Mathematica and introduces a major new paradigm for computation

Building on Mathematica's time-tested core symbolic architecture, version 7.01 adds nearly a thousand new functions almost doubling the total number of functions in the system, dramatically increasing both the breadth and depth of Mathematica's capabilities, as well as introducing hundreds of major original algorithms, and perhaps a thousand new ideas, large and small

home : _http://www.wolfram.com/products/mathematica/quickrevisionhistory.html
Whatґs new:_http://www.wolfram.com/products/mathematica/newin7/
Guide:_http://reference.wolfram.com/mathematica/guide/Mathematica.html
Installing Mathematica on Windows : _http://reference.wolfram.com/mathematica/tutorial/InstallingMathematicaOnWindows.html

System requirements:
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Windows 2000 32-bit ---
Windows XP 32-bit, 64-bit
Windows Server 2003 32-bit, 64-bit
Windows Compute Cluster Server 2003 --- 64-bit
Windows Vista 32-bit, 64-bit
Windows Server 2008 --- 64-bit