E-commerce refers to business transactions conducted online, while m-commerce refers to commerce using mobile devices. The document provides an overview of e-commerce and m-commerce, including definitions, current practices and trends, examples of companies and individuals involved, and statistics on usage and growth. It also discusses some challenges and benefits of e-commerce and m-commerce. Key points covered include the rapid annual growth of e-commerce sales, Amazon's $1 billion in 2010 m-commerce sales, and the global growth of mobile subscribers, particularly in China and India.