Electronic payment systems have revolutionized business by reducing paperwork and transaction costs. Common electronic payment modes include credit cards, debit cards, smart cards, e-money, and electronic funds transfer. Credit cards allow customers to make purchases and pay the balance later, while debit cards deduct funds immediately from the linked bank account. Smart cards contain encrypted payment and personal information. E-money refers to online payments via payment cards or services like e-cash. The Automated Clearing House (ACH) network facilitates electronic funds transfers between bank accounts in the US.