The controversial "Ribbon" user interface that Microsoft introduced in Office 2007 is being used for some of Windows 7's (download link) built-in applications, such as WordPad and Paint. According to Mike Nash, corporate vice president of Windows product management, the Ribbon will be adopted for many other Windows 7 applications from Microsoft as well as third-party vendors.

"This is one of the things we think will differentiate apps written for Windows 7, as opposed to those for earlier versions of Windows," Nash said in an interview today, as the company released the Windows 7 beta for public download.

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