The buying and selling of products and services by businesses and consumers through an electronic medium, without using any paper documents. E-commerce is widely considered the buying and selling of products over the internet, but any transaction that is completed solely through electronic measures can be considered e-commerce. E-commerce is subdivided into three categories: business to business or B2B (Cisco), business to consumer or B2C (Amazon), and consumer to consumer or C2C (eBay). It is also called as electronic commerce. E-commerce websites can be designed and created through many tools such as Magento, Open cart, woo commerce, Zen cart, Joomla, Virtue Mart.