Business to Business (B2B):

B2B (business-to-business), also known as e-biz, is the exchange of products, services, or information between businesses rather than between businesses and consumers and it is performed in much higher volumes than business-to-consumer (B2C) applications. Retailers are typically B2C companies while manufacturers, wholesalers and other suppliers are typically B2B companies. For example a company selling photocopiers would likely be a B2B sales organization as opposed to a B2C sales organization.
B2B Web sites can be sorted into:
• Company Web sites, since the target audience for many company Web sites is other companies and their employees. Sometimes a company Web site serves as the entrance to an exclusive extranet available only to customers or registered site users. Some company Web sites sell directly from the site, effectively e-tailing to other businesses.
• Product supply and procurement exchanges, where a company purchasing agent can shop for supplies from vendors, request proposals, and, in some cases, bid to make a purchase at a desired price. Sometimes referred to as e-procurement sites, some serve a range of industries and others focus on a niche market.
• Specialized or vertical industry portals which provide a "subWeb" of information, product listings, discussion groups, and other features. These vertical portal sites have a broader purpose than the procurement sites (although they may also support buying and selling).
• Brokering sites that act as an intermediary between someone wanting a product or service and potential providers. Equipment leasing is an example.
• Information sites (sometimes known as infomediary), which provide information about a particular industry for its companies and their employees. These include specialized search sites and trade and industry standards organization sites.
Many B2B sites may seem to fall into more than one of these groups. Models for B2B sites are still evolving.