From Wikipedia:
Windows Phone 7 is a mobile operating system developed by Microsoft, and is the successor to their Windows Mobile platform.[2] It launched in Europe, Singapore and Australasia on October 21, 2010, and in the US & Canada on November 8, 2010, with Asia to follow in 2011.[3] With Windows Phone 7, Microsoft offers a new Metro user interface, integrates the operating system with Microsoft's other services, and plans to strictly control the hardware it runs on.[4]
Microsoft unveiled Windows Phone 7 on February 15, 2010, at Mobile World Congress 2010 in Barcelona[5] and revealed additional details at MIX 2010 on March 15. Windows Phone 7 was released to manufacturing on September 1, 2010,[6] and the final SDK was made available on September 16, 2010.[7]
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Credits To : http://en.wikipedia.org/wiki/Windows_Phone_7
