This document provides an overview of e-business and e-commerce. It defines e-business as the digital enablement of transactions and processes within a firm using information systems under the firm's control. E-business applications primarily involve applying digital technologies to internal business processes. E-commerce refers specifically to commercial activities involving an exchange of value over the internet. The document outlines different types of e-business models including business-to-consumer, business-to-business, and consumer-to-consumer, as well as technology-based models like peer-to-peer and mobile commerce. It also discusses the benefits, limitations, and key aspects of e-business and e-commerce.