E-commerce business models can include business-to-business (B2B), business-to-consumer (B2C), and consumer-to-consumer (C2C). B2B involves transactions between businesses, like manufacturers selling supplies to other companies. B2C involves retailers selling directly to consumers online through virtual storefronts like Amazon and Barnes & Noble websites. C2C platforms like eBay allow individuals to sell goods to each other with the site taking transaction fees. E-commerce has grown significantly since emerging in the 1990s due to increased internet access and technology advances.