Windows Phone is a mobile operating system developed by Microsoft, and is the successor to its Windows Mobile platform. Unlike its predecessor, it is primarily aimed at the consumer market rather than the enterprise market. It was launched in October 2010. With Windows Phone, Microsoft offers a new user interface with its design language named Metro, integrates the operating system with third party and other Microsoft services, and controls the hardware it runs on.
Do you want to learn how to write programs for Windows Phone? Register for CSIT 291-01 which will be offered in Fall 2011.
The above text is modified from Wikipedia.