E-commerce involves the buying and selling of goods and services over electronic systems like the internet. It uses technologies such as mobile commerce, electronic funds transfer, supply chain management, and inventory management. There are different models of e-commerce including B2B (business to business), B2C (business to consumer), C2C (consumer to consumer), C2B (consumer to business), B2G (business to government), G2B (government to business), and G2C (government to consumer). B2B involves selling between businesses, B2C directly from businesses to consumers, and C2C between individual consumers such as on sites like eBay.

1. BY:
SYLVESTER

2.  E-commerce or eCommerce, is trading in products or
services using computer networks, such as the
Internet. Electronic commerce draws on technologies
such as mobile commerce, electronic funds transfer,
supply chain management, Internet marketing, online
transaction processing, electronic data interchange
(EDI), inventory management systems, and
automated data collection systems. Modern electronic
commerce typically uses the World Wide Web for at
least one part of the transaction's life cycle, although it
may also use other technologies such as e-mail.

3.  e business, or e-business, is the application of
information and communication technologies (ICT) in
support of all the activities of business. Commerce
constitutes the exchange of products and services between
businesses, groups and individuals and can be seen as one
of the essential activities of any business. Electronic
commerce focuses on the use of ICT to enable the external
activities and relationships of the business with
individuals, groups and other businesses. The term "e-business"
was coined by IBM's marketing and Internet
teams in 1996.

4. B2B
B2C
C2C
C2B
B2G
G2B
G2C

5. B2B stands for Business to Business.
It consists of largest form of
Ecommerce. This model defines that
Buyer and seller are two different
entities. It is similar to manufacturer
issuing goods to the retailer or
wholesaler.

6.  B2C business model sells its products
directly to a customer through its online
website. The customer can select the
product of interest & order it. Further a
message will be sent of the orders
confirmation to the customer.

7.  There are many sites offering free
classifieds, auctions, and forums where
individuals can buy and sell thanks to
online payment systems like PayPal
where people can send and receive money
online with ease. eBay's auction service is
a great example of where person-to-person
transactions take place everyday
since 1995.

8.  In this Model, a consumer approaches the website
showing multiple business org. for a particular service.
 Customer places/states an estimate of the amount
he/she wants to spend for a particular service.
 For Ex. Comparison of interest rates of personal loan
or car loan provided by various banks via website.

9.  This is a variant of B2B model. Such websites are used by
govt. to trade and exchange information with various
business organizations.
 Such websites are used by the govt. & provide a medium
to business to submit application forms to the govt.

10. Govt. uses B2G model to approach
business orgs. Such websites support
auctions, tenders & application
submission functionalities.

11.  Govt. uses G2C model website to approach citizen In
general. Such websites support auctions of vehicles,
machinery or any other material.
 It also provides services like registration for birth,
marriage or death certificates.