This document provides an overview of e-commerce. It defines e-commerce as the process of buying, selling, transferring or exchanging products, services and information via electronic networks and computers. The document then briefly discusses the history of e-commerce from the 1970s to modern day use of the internet. It identifies four main types of e-commerce: B2C, C2C, B2B, and C2B. The document outlines advantages such as low costs, global reach and 24/7 access. It also discusses how different departments should participate in e-commerce projects and the benefits to organizations and consumers.