- 1.Business-to-Business (B2B): Electronic deal of stock and services in the two companies.
- 2.Business-to-Consumer (B2C): Electronic deal of stock and services among the companies and consumers.
- 3.Consumer-to-Consumer (C2C): Electronic deal of stock and services among the consumers.
- 4.Consumer-to-Business (C2C): Electronic deal of stock and services among the consumers.