Nadia Hopper continues her read of chapter 3, Selling, The Oxygen of Business, and we discuss how an Internet site validates a business and allows potential customers around the world to: quickly find that your company exists; gather information; and inititate contact. Then we list some easy and cheap ways to set up your site. When more power is needed, we talk about adding features such as e-commerce and e-catalogs, and outline how sites are promoted on Yahoo, Google, MSN and thousands of other locations using "SEM" (Search Engine Marketing). In this part we also describe how online sales may cause problems with existing retail and distribution channels.