The software of keyboardmonitor is developed, the analysis program of key value is designed using the state variable method, and the functions of man-machine talk are implemented.
编制键盘监控软件，采用状态变量法设计键值分析程序，实现人机对话功能。
2
Virtual Network Computing (VNC) support is required for remote maintenance, especially if the system has no monitor or keyboard.
需要通过虚拟网络计算 (VNC) 支持来进行远程维护，特别是当系统没有显示器或键盘时。
3
Users access applications through a computer, using a mouse and keyboard as input elements, and a monitor as feedback.