E-commerce involves the buying and selling of products or services through electronic systems like the internet. It encompasses various models such as B2C, B2B, and C2C, and has evolved through innovative technologies. The document highlights its origin, growth, and challenges including privacy concerns and dynamic pricing models.

2. INTRODUCTION
Electronic commerce, commonly known as e-commerce, is the buying
and selling of product or service over electronic systems such as the Internet and
other computer networks.
 The Origin of E-commerce

3.  Group buying
 Online shopping
 Online banking
 E-ticket
 Payment systems

4.  Business to Consumer (B2C)
 Business to Business (B2B)
 Consumer to Consumer (C2C)

5.  Unregulated nature
 Unprecedented information-transfer
capabilities
 Break-neck growth
 Innovative new technologies
 Privacy invasion
 Other critical components

6.  Auction Model
 Portal Model
 Dynamic Pricing Models
 Online Trading and Lending Models

8. The Future of E-commerce