"Metro" is the codename of a typography-based design language by Microsoft, later renamed to Microsoft design language.[1] A key design principle is better focus on the content of applications, relying more on typography and less on graphics ("content before chrome"). Early uses of its principles began as early as Microsoft Encarta 95 and MSN 2.0,[2][3] and later evolved into Windows Media Center and Zune. The design was formally introduced under the name "Metro" during the unveiling of Windows Phone 7 and has since been incorporated into other Microsoft products, such as the Xbox 360 system software, Windows 8 and Outlook.com.[