Computers are so commonplace that it's easy to become jaded with their speed and power. Yet every so often a new twist on computer technology comes along — something like virtualization — to remind you of their seemingly limitless possibilities. Virtualization, in essence, allows a single physical computer with a single operating system to be subdivided into many “virtual” computers, each with its own operating system. A retailer could use one of those virtual computers to support a new ...

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