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About product and suppliers:
        Alibaba.com offers 132,668 a os products. About 9% of these are set top box, 6% are tablet pc, and 3% are pdas. 

A wide variety of a os options are available to you, such as tablet pc, diapers/nappies, and external. You can also choose from 10", 7", and 8". As well as from intel, mtk, and allwinner. And whether a os is 1gb, 2gb, or ≥ 4gb. 

There are 132,668 a os suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of a os respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 24,501 with ISO9001, 19,523 with Other, and 4,287 with ISO14001 certification.