青岛市城市远程集超系统中的手持器程序，用的是KEIL C7.0，用了北京天石的操作系统，是一个典型的嵌入式POS的程序，包含了常见手持器的基本功能，如用了红外1。1版本的通信协议，接触，射频卡读写等。-Qingdao City Remote Set-system handheld device procedures, it was KEIL C7.0, with the Beijing-day rock of the operating system, is a typical embedded POS procedures, including the common handheld device's basic functions, such as using an infrared. A version of the communication protocols, contacts , RF card reader so.