E-commerce: refers to the purchase and sale of goods and services and the transfer of funds through digital communications. Which of the following does not belong to e-commerce? ['Microsoft establishes its own homepage and provides online ordering of computer software business.', 'Business-to-business transfer payment through internet banking.', 'Sina provides a lot of information to people for free every day.', 'Amazon Web Bookstore accepts orders online, but delivers products by mail.']