1. B2B - Business to business:
Electronic commerce that is conducted between business organizations is referred to as business-to-business or B2B. for example, transactions between the manufacturing industry with suppliers of raw materials.
2. B2C- Business to Consumer:
Electronic commerce that is conducted between traders and consumers is referred to as business-to-consumer or B2C. This is the type of electronic commerce conducted by companies such as Amazon.com, ebay.com, etc.,
3. C2B - Consumer to Business:
It is an electronic commerce business model in which consumers (individuals) offer products and services to companies and the companies pay them.
4. C2C - Consumer to Consumer:
Customer to Customer (C2C) markets are new ways to allow customers to interact with each other. In customers to customer markets, customers can sell goods and or services to each other. There are many sites offering free classifieds, auctions, and forums. Eg. Quickr.com etc.,