Ecommerce buying and selling of goods and services over public and private computer networks. Everything to do with application of information and communication technologies to the conduct of business between organizations, company to consumer/consumer to consumer. Modern consumers, less likely to use single information channel. Customers can know more about a product or service than the salesperson who is actually facilitating the sale. Harder for small businesses to keep up. End-to-end customer security (information is only shared appropriately) Merchant companies take title to goods they sell (buy and resell them) Non-merchant companies arrange for purchase and sale of goods without ever owning or taking title. Three types of merchant companies: sell directly to consumers, sell to companies, sell t government. Business to consumer (b2c) sale between supplier and retail customer. Business to business (b2b) - sale between companies (raw material suppliers) Business to government (b2g) sale between companies and governmental organizations.