Electronic Data Interchange (EDI) is the computer-to-computer exchange of structured information, by agreed message standards, from one computer application to another by electronic means and with a minimum of human intervention. In common usage, EDI is understood to mean specific interchange methods agreed upon by national or international standards bodies for the transfer of business transaction data, with one typical application being the automated purchase of goods and services.

Despite being relatively unheralded, in this era of technologies such as XMLservices, the Internet and the World Wide Web, EDI is still the data format used by the vast majority of electronic commerce transactions in the world.