ISS
[1] Initial Send Sequence Number - Identifier unter "TCP"/"IP", erste gesendete Sequenz bei einer Verbindung[2] Integrates Switching System
[3] Information Storage System (->""IEEE" Standard Dictionary")
[4] Input Subsystem (->""IEEE" Standard Dictionary")
[5] CERT Internet Security Scanner/Systems (http://iss.net/ )
[6] International Switching Symposium World Telecommunication Congress (IEEE/VDE)
[7] Imaging Science Subsystem (Cassini Orbiter, NASA, http://www.jpl.nasa.gov/cassini/) \{Astronomie\}
[8] International Space Station (vergl. 2.)) \{Weltraumfahrt\}
[9] Instruction Set Simulator
[10] Internet Selling System
[11] Wiscasset, ME, USA -internationale Fughafen-Kennung