E-commerce not necessarily means conducting commerce through the Internet alone, but also means other forms of electronic communication. Actually, the roots of e-commerce lie not in the Internet, but in other forms of electronic communication. Technologies like Electronic Data Interchange (EDI) and Electronic Funds Transfer (EFT) predate the advent of e-commerce using the Internet and put the foundations for the growth of e-commerce we see today. The point here is that these older and high-powered technologies have been used to connect one business house to one another business.
The protocols used for communication between the business houses were point-to-point. But the recent advances accomplished in e-commerce allows for a one-to many or many-to-many approach and thus help to expand greatly any single business to any number of businesses throughout the world.