说明：  超市管理系统什么是POS业务？ POS是英文Point of Sales的缩写，意为销售点终端。销售点终端通过网络与主机系统连接，工作时，将信用卡在POS机上“刷卡”并输入有关业务信息（交易种类、交易金额、密码等），由POS机将获得的信息通过网络送给主机进行相应处理后，向POS机返回处理结果，从而完成一笔交易。
(Supermarket Management System What is POS business? Point of Sales POS is the English acronym, which means point of sale terminals. Point of sale terminal and the host system through the network connection, work, credit card POS machines in the " card" and enter the relevant business information (transaction type, transaction amount, password, etc.), the POS machine will get the information sent through the network host appropriate treatment, return processing results to the POS machine to complete the transaction.)