The Free On-line Dictionary of Computing (30 December 2018):

electronic commerce
e-commerce

    (EC) The conducting of business
   communication and transactions over networks and through
   computers.  As most restrictively defined, electronic commerce
   is the buying and selling of goods and services, and the
   transfer of funds, through digital communications.  However EC
   also includes all inter-company and intra-company functions
   (such as marketing, finance, manufacturing, selling, and
   negotiation) that enable commerce and use electronic mail,
   EDI, file transfer, fax, video conferencing, workflow,
   or interaction with a remote computer.

   Electronic commerce also includes buying and selling over the
   web and the Internet, electronic funds
   transfer, smart cards, digital cash (e.g. Mondex), and all
   other ways of doing business over digital networks.

   [Electronic Commerce Dictionary].

   (1995-10-08)