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About product and suppliers:
        Alibaba.com offers 153,471 os products. About 5% of these are mobile phones, 4% are tablet pc, and 1% are valves. 

A wide variety of os options are available to you, such as tablet pc, netbook. You can also choose from 12", 7", and 10". As well as from capacitive screen, resistance screen. And whether os is red, multi, or pink. 

There are 152,079 os suppliers, mainly located in Asia. The top supplying countries or regions are China, Pakistan, and India, which supply 97%, 1%, and 1% of os respectively. 

Os products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 43,492 with ISO9001, 22,993 with Other, and 5,221 with ISO14001 certification.