This document provides an overview of electronic commerce (EC) with 10 learning objectives. It defines EC and its categories such as business-to-business, business-to-consumer. It describes the content and framework of EC including classifications of transactions. It also discusses e-commerce 2.0, social commerce, digital world, drivers of EC, business models, and benefits and limitations of EC. The overview aims to help readers understand the key concepts, models, opportunities and challenges of the electronic commerce field.