• Business-to-Business (B2B)
• Business-to-Consumer (B2C)
• Consumer-to-Consumer (C2C)
• Consumer-to-Business (C2B)
• Business-to-Administration (B2A)
• Consumer-to-Administration (C2A)

Business-to-Business (B2B): This kind of eCommerce consists of all the electronic transactions and dealings related to the goods and services. These basically are conducted between companies and include conventional wholesalers and producers dealing with retailers.

Business-to-Consumer (B2C): The Business-to-Consumer eCommerce is related to the transactions and relationship between businesses and the end customers. This is mainly to do with the retail eCommerce trade that takes place online. With the inception of the internet, B2C eCommerce has evolved to a great extent. Today, we find scores of electronic shopping sites and virtual stores on the web, that sell myriad products, ranging from computers, fashion items to even necessities.

In this case, the customer has more info about the products in the form of informative content and there is also a chance to buy products at cheaper rates. Most times, quick delivery of the order is also maintained.

Consumer-to-Consumer (C2C): This consists of electronic transactions of products and services between two customers. These are mainly conducted through a third party that provides an online platform for these transactions. Sites, where old items are bought and sold, are examples of C2C eCommerce.

Consumer-to-Business (C2B): In this, a complete reversal of the selling and buying process takes place. This is very relevant for crowdsourcing projects. In this case, individuals make their items or services and sell them to companies. Some examples are proposals for a company site or logo, royalty free photographs, design elements and so on.

Business-to-Administration (B2A): In this kind of eCommerce transaction, there are dealings between companies and public administration. It encompasses different services, such as social security, fiscal measures, legal documents, employment and so on.

Consumer-to-Administration (C2A): In this eCommerce model, electronic transactions are carried out between individuals and public administration. Some examples are distance learning, information sharing, electronic tax filing, and so on.

The main objective of both the B2A and C2A types of eCommerce is to increase flexibility, efficiency, and transparency in public administration.