extranet
noun [ C ]
uk/ˈekstrənet/ us IT, INTERNET, COMMUNICATIONS
a system of computers that makes it possible for a company and people outside the company to communicate and share information over the internet. Extranets also allow employees who work away from the office to connect to the office computers:
Extranets enable suppliers to react promptly to changes in a company's business, thereby cutting out wasteful stock and unnecessary human command chains.
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intranet