商品条形码技术的发展带来了一场商业管理和信息领域的革命。它的应用是由条码、识读设各、电子计算机及通信系统组成。POS系统，即商店自动销售管理系统，是利用现金收款机作为终端与主机相联，并借助于识读设备，将商品条码所表示的信息录入计算机，由计算机从数据库文件中查 The development of commodity bar code technology has brought about a revolution in the field of business management and information. Its application consists of barcodes, reading devices, electronic computers and communication systems. The POS system, ie, the shop’s automatic sales management system, uses a cash register as a terminal to connect with the host, and uses the reading device to record the information represented by the product bar code into a computer, and the computer checks the database file.