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

electronic data interchange

    (EDI) The exchange of
   standardised document forms between computer systems for
   business use.  EDI is part of electronic commerce.

   EDI is most often used between different companies ("trading
   partners") and uses some variation of the ANSI X12
   standard (USA) or EDIFACT (UN sponsored global standard).

   [Electronic Commerce Dictionary].

   (1995-10-06)