Check out the features: http://www.microsoft.com/windows/windows-7/features/default.aspx [4]
Find out how to get Windows 7: http://www.microsoft.com/windows/windows-7/get/default.aspx [5]
Compare the editions: http://www.microsoft.com/windows/windows-7/compare-editions/default.aspx [6]
More information available at: http://www.microsoft.com/windows/default.aspx [7]
Links:
[1] http://pulse.veltsos.com/category/it/software/software/os/microsoft
[2] http://pulse.veltsos.com/category/it/software
[3] http://linux.philosweb.com/drupal/files/image_2_116.png
[4] http://www.microsoft.com/windows/windows-7/features/default.aspx
[5] http://www.microsoft.com/windows/windows-7/get/default.aspx
[6] http://www.microsoft.com/windows/windows-7/compare-editions/default.aspx
[7] http://www.microsoft.com/windows/default.aspx