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About product and suppliers:
        Alibaba.com offers 13,120 os 4 products. About 8% of these are tablet pc, 4% are set top box, and 1% are pos systems. 

A wide variety of os 4 options are available to you, such as tablet pc, tft. You can also choose from 1gb, ≥ 4gb, and 2gb. As well as from 10", 7", and 12". And whether os 4 is intel, mtk, or rockchip. 

There are 13,220 os 4 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 99%, 1%, and 1% of os 4 respectively. 

Os 4 products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,684 with ISO9001, 1,905 with Other, and 474 with ISO14001 certification.