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About product and suppliers:
        Alibaba.com offers 2,594 united computer systems products. About 6% of these are desktops, 1% are medical x-ray equipments & accessories, and 1% are testing equipment. 

A wide variety of united computer systems options are available to you, such as all-in-one, desktop, and barebone system. You can also choose from 24", 21", and no monitor. As well as from cd-rom, dvd-rom. And whether united computer systems is free samples, or paid samples. 

There are 2,577 united computer systems suppliers, mainly located in Asia. The top supplying countries or regions are China, United States, and United Kingdom, which supply 93%, 3%, and 1% of united computer systems respectively. 

United computer systems products are most popular in Southeast Asia, North America, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 899 with ISO9001, 192 with ISO14001, and 145 with OHSAS18001 certification.