软件用户界面的发展经历了从简单到复杂、从低级到高级的过程，用户界面在软件系统中的价值比重越来越高。

如果编程之道是完美的，那么操作系统就是完美的；如果操作系统是完美的，那么编译程序就是完美的；如果编译程序是完美的，那么应用程序就是完美的。于是，用户满意之极，和谐应运而生。-Development software user interface has experienced from simple to complex, from low to high, the user interface in the software system is more and more high value.

If the Tao of programming is perfect, then the operating system is perfect　if the operating system is great, then the compiler is perfect　if the compiler is great, then the application is perfect. So, the user satisfaction is very harmonious, emerge as the times require.