This document provides an overview of electronic commerce and electronic payment systems. It discusses the history of e-commerce from the 1970s development of electronic fund transfer to the rise of the world wide web in the 1990s. It defines electronic payment as a subset of e-commerce used to purchase goods or services online. Specific electronic payment methods discussed include electronic funds transfer, electronic cash, electronic checks, debit cards, and smart cards. The pros and cons of these methods are summarized. The document also provides an overview of electronic payment systems used in India, including the increasing use of payment cards and promotion of digital payments through various channels.