It must be efficient when calling system resources such as file operations, interprocess communications, and process control. 在调用系统资源如文件操作，内部进程通信，进程控制等方面一定要有效率。
Control all computers in a LAN, can lock, close or startup them, and can also control their processes, send message and console command to them. 计算机远程监控，可以对局域网内的所有计算机进行远程控制，能进行锁定，开关机，进程控制，发送消息，发送控制台命令。
