E-Distribution is a distribution concept which refers to electronic buying and selling of goods and services over a public network without the use of physical media, normally by downloading from the internet straight) to a consumer's device.
E-procurement (electronic procurement, sometimes also known as supplier exchange) is the business-to-business or business-to-consumer or business-to-government purchase and sale of supplies, work, and services through the Internet as well as other information and networking systems, such as electronic data interchange and enterprise resource planning.
Exchange are owned online marketplace that connect hundred of suppliers to thousand of buyers. It make money by changing commission and reduce search cost.
Industry consortia is an industry - owned vertical market that enables buyers to purchase direct goods and services from a limited number of invited participants.