The article discusses payment systems, from how they work to their role in the economy. It covers different payment instruments like cash, cards, and transfers, as well as risks and security measures. The researchers also look at payment systems in Europe, the US, and Asia, and new players like mobile payments and remittance services. The settlement of trading activities and wholesale payments are explored, along with the requirements of corporations and the role of banks in the payments business. Overall, the article provides a comprehensive overview of the structure, economics, and importance of payment systems in today's world.