用户界面（或接口）是指：人与机器（或程序）之间交互作用的工具和方法。如键盘、鼠标、跟踪球、话筒都可成为与计算机交换信息的接口。-User interface (or interface) means: man and machine (or process) the interaction between the tools and methods. Such as keyboard, mouse, track ball, a microphone can be become the exchange of information and computer interface.