POS-peripherals include magnetic card readers, currency detectors, banknote counters, cash boxes, programmable keyboard and customer displays. There is such type of peripheral equipment, as cash boxes, containers used for the storage of money and required for the calculations with clients in catering establishments and in trade enterprises. For the work with the cash is used another peripheral equipment - banknote counters needed for quick and accurate counting of large sums, and also currency detectors, allowing to identify and withdraw counterfeit banknotes from money turnover. Peripheral equipment includes also magnetic stripe readers (magnetic card readers), which allow to automate the process of service in hypermarkets and stores.