Participant-Based Classification
•Business-to-business (B2B) electronic commerce:  a process undertaken by a company to sell goods or services to other business firms or not-for-profit organizations.
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•Business-to-government (B2G):  using Internet technologies in business processes dealing with government agencies.
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•Consumer-to-consumer (C2C):  the processes that occur when individuals who are not operating formal businesses use the Internet to conduct transactions.