Symbian OS is a proprietary operating system designed for Smartphones, mobile devices, with associated libraries, user interface frameworks and reference implementations of common tools, produced by Symbian Ltd. It is popular in Europe and Asian countries. Based on 2006 statistics, internationally Symbian OS had a 67% share of the smart mobile phone market, with Microsoft having 15% and RIM (Blackberry) having 6%. Windows Mobile, RIM, and Palm OS are dominant among US sales. Over 20.4 million Symbian smartphones shipped in Q3 2007. Sales from China accounted for 12% of Symbian smartphone sales in Q2 2007.
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