This document discusses different types of business models and e-commerce. It defines e-commerce as digitally enabled commercial transactions between organizations and individuals. E-business refers to digital processes within a firm. Major types of e-commerce include business-to-consumer, business-to-business, consumer-to-consumer, and peer-to-peer. It also outlines various electronic payment systems used in e-commerce such as credit cards, digital wallets, stored value accounts, and digital checking.