To imitate one system with another, primarily by hardware, so that the imitating system accepts the same data, executes the same computer programs, and achieves the same results as the imitated system.

• 主要通过硬件把一个系统模拟成另一个系统,这种模拟应使模拟系统与被模拟系统接收相同的数据,执行相同的计算机程序,获得相同的结果。