Electronic commerce/e-commerce the use of computer networks to facilitate commercial activities, including the production, distribution, sale, and delivery of goods and services. Internet the interconnected logical networks that link computers worldwide. Intranet closed systems linking specific users internal to a company or group; commonly used for data exchange. E-commerce has brought fundamental change to the business world in three key areas: Traditional businesses are adapting all facets of their operations to the online model. Electronic retailing/e-retailing the supply of tangible or electronic goods or services over the internet. Supply of tangible goods involves a conventional mode of delivery; electronic goods are downloaded directly to the customer"s computer. Electronic transfer of funds payment made through electronic media such as telephone or internet rather than by cash or cheque. Payment may take the form of credit card charges, debit or bank accounts, or even e-cash. Often customers can access these forms of payment on the business"s website.