Mind's Eye Interactive

E-businesses may be organized by their function:

• E-shop: A site where consumers directly buy goods or services from a seller. These transactions take place in real-time and mimic physical shopping, with terms like “browsing” and “adding to your shopping cart.” Amazon.com is a well-known example.
• E-commerce: Any type of transaction done over the internet or another computer network. E-commerce is at the heart of many other e-business models.
• E-procurement: The buying and selling of supplies and services over the internet. This is also known as supplier exchange. This allows businesses to automate transactions, control their inventory more easily, reduce purchasing overhead, and qualify for large-volume discounts in certain cases.
• E-auctions: E-auctions are also known as reverse auctions. They differ from ordinary auctions in that it is the sellers who are competing for business rather than the buyers. These sellers normally lower their prices over time rather than raise them. Since eBay operates as a normal auction, it falls into the e-shop category.
• Collaboration platforms: A new category of software in which individuals can communicate through a number of channels. Users may pay for access to the space and/or may pay fees based on their bandwidth, number of users, or other data.
• Third-party marketplaces: A site where third-party users sell new and used items. The best-known example is Amazon Marketplace.
• Virtual Value Chain: A business model based on sending out valuable information through an Extended Enterprise, or an organizational network of firms that combine to offer goods and services.
• Information Brokerage: Online sites that research information for clients.
• Telecommunication: Sites that allow for communication over large distances. This can be done over the Internet and/or over local area networks (LANs) or wide area networks (WANs).

Or by their clients:

• Business-to-business (B2B): The most common of these transactions take place between some combination of manufacturer, wholesaler, and retailer.
• Business-to-consumer (B2C): Whenever an individual user purchases something online.
• Business-to-employee (B2E): Services offered by a business to its employees (insurance, 401(k), etc.)
• Business-to-government (B2G): Whenever a company sells goods or services to the government levels.
• Government-to-business (G2B): A non-commercial interaction between government levels and the business sector.
• Government-to-government (G2G): Non-commercial interactions between governments.
• Government-to-citizen (G2C): Sites, such as USA.gov, by which governments interact with their citizens.
• Consumer-to-consumer (C2C): Business transactions between consumers through a third party.
• Consumer-to-business (C2B): A reversed relationship in which users offer goods and services to businesses.

Lists come from Wikipedia”Electronic Business.”