windows 1.0 is the first Microsoft made by co-founders Bill Gates and Paul Allen.
Microsoft's OS is Windows.
Windows 7 is the name of new Microsoft's operating system.
Microsoft's operating system is Windows, of which XP, Windows 7 and 8, are just three examples.
Microsoft's first operating system named Windows was introduced on November 20, 1985. The Microsoft Windows operating system is now available in 137 languages.
Windows is a popular operating system, but it is made by Microsoft, not Apple.
I guess windows 7 is the latest version of operating system in MICROSOFT.
operating system
Microsoft Windows 7
Microsoft Windows.
Windows 7.
When Microsoft created Windows
Microsoft.