This document defines e-commerce as commercially transactions conducted electronically over the internet. It discusses how e-commerce allows buying and selling of goods and services online between businesses and consumers. The document then provides a brief history of e-commerce from its origins in electronic funds transfer and electronic data interchange in the 1970s-1980s to the development of the World Wide Web in the 1990s. It also lists pros and cons of e-commerce such as increased access to markets but lack of personal touch.