The model is also called as virtual instrument (VI), which means that the software unites the computer and instrument hardware and users can manipulate the computer as an own designed traditional instrument.

• 这种方式也就是所谓的虚拟仪器(Virtual Instruments,简称VI)的概念,即通过应用程序将计算机与仪器硬件结合起来,用户可以通过友好的图形界面操作这台计算机,就象在操作自己定义、自己设计的一台单个传统仪器一样。