Electronic commerce (e-commerce)           business transaction that occurs over an electronic network, such as

                                                                              the Internet.

    Business-to-consumer (B2C ) e-commerce         consists of the sale of goods and services to the   

                                                                                           general public, such as at shopping website.

    Consumer-to-consumer (C2C ) e-commerce           occurs when one consumer sells directly to another,

                                                                                                such as in an online auction.

    Business-to-business (B2B ) e-commerce             occurs when businesses provide goods and services to 

                                                                                             other businesses, such as online advertising, recruiting,

                                                                                             credit, sales, market research, technical support, and

                                                                                             training.

Mobile commerce(m-commerce)           to identify e-commerce that takes place using mobile devices.