排号系统，可用于银行，有服务器和客户机（柜台机，叫号机），功能强大，不断更新。-Queuing system can be used for banks, server and client (the counter machine, called the Unit), a powerful, constantly updated.

简单的银行排号机。带注解方便理解逻辑思路-Arranging a simple bank machine. Easy to understand the logic of ideas with comments