ISN is an initialism that can stand for:
International Relations and Security Network, a free public service that provides a wide range of high-quality and comprehensive products and resources to encourage the exchange of information among international relations and security professionals worldwide.
International Suppliers Network, a vendor tracking system.
Interstellar Network News, a news network in the fictional Babylon 5universe.
* "Idioma de Signos Nicaragüense" meaning
Nicaraguan Sign Languagein the Spanish language.
Sloulin Field International Airport, Williston, North Dakota, USA (IATA airport code)
Internment Serial Number, a number which captives of the United States Armed Services apprehended during its war on terror are assigned.
* Initial Sequence Number, a number exchanged in TCP segments during
computer networkcommunication between a client and a server. Central in a SYN flooddefense known as SYN cookies.
* Intel Software Network
* InfoSec News
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