POS machine POS is short for English Point of sales, Chinese meaning point of sale terminal. It can be divided into two types: one, wired POS machine, through the telephone line to run data; Second, wireless POS machine, through the GPRS function of China Mobile SIM card operation data. According to the other situation, it can be divided into the following two types: First, consumer POS, which has the functions of consumption, pre-authorization, query stop payment list, etc., mainly used for special merchants to accept bank card consumption; Second, transfer POS, with financial transfer and card transfer and other functions, mainly used in the unit financial department. To apply for the installation of the credit card machine, you only need to prepare the following materials: 1, a copy of the business license 2, a copy of the tax registration certificate 3, a copy of the organization code certificate 4, a bank account opening license (for public accounts) 5, the corporate ID card 6, the official seal, the corporate seal.