This document discusses electronic payment systems. It defines e-payment as any payment made through a telecommunications or electronic network from individuals or businesses to other businesses. The document outlines different types of e-payment methods including electronic funds transfer, mobile payments, and electronic token-based systems. It also describes various e-payment media like credit cards, debit cards, smart cards, electronic checks, e-cash, and e-wallets. Advantages of electronic payment systems are increased speed, convenience and sales while disadvantages include security concerns, disputed transactions, and increased business costs.