An emulator whose execution is not controlled by a control program ; it does not share system resources with other programs and excludes all other jobs from the computing system while it is being executed.

• 其执行不受控制程序控制的一种仿真程序,它不同其它程序一起共享系统资源,而且在其执行期间,所有其它作业都被排斥在计算系统之外。