What is E-Commerce ?What is E-Commerce', 'Electronic Commerce (EC) is the paperless exchange of business information using Electronic Data Interchange (EDI) and related technologies. If you are familiar with Electronic Mail (E-Mail), computer bulletin boards, facsimile machines (faxes), Electronic Funds Transfer (EFT) You can very well understand what is e-commerce. These are all forms of EC. All EC systems replace all or key parts of paper-based work flow with faster, cheaper, more efficient, and more reliable communications between machines. In today's Defense Department procurement arena, however the most important EC technology to know about is Electronic Data Interchange, or EDI.