This document discusses e-commerce and m-commerce. It begins with an introduction to e-commerce, defining it as buying and selling of products or services via the internet. It then covers categories of e-commerce like B2B, B2C, etc. and examples. Models of e-commerce include facilitation, aggregation, and matching. Benefits are listed for both buyers and sellers. Pros and cons are discussed for businesses and customers. M-commerce is then introduced as buying/selling through mobile devices. Benefits and models of m-commerce are outlined. Applications like mobile ticketing, content purchase, information services, and mobile banking are described. Advantages and disadvantages of m-commerce are listed. The