Virtual instruments is a kind of instruments of functional meaning, it is composed of personal computer, hardware and applied software.

虚拟仪器是一种功能意义上的仪器，由个人计算机、仪器硬件及应用软件组成。

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The hardware progression has been from the mainframe to the personal computer to more powerful clustered servers, with cost and access moving back and forth between large enterprises and corporations to small businesses and individuals.

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