[1] ISDN Switching Module - ISDN-Teilnehmer-Modul

[2] ISDN Standards Management (ETSI Group)

[3] Institut für Schiffs- und Meerestechnik der TU-Berlin

[4] InterStellar Medium {Astronomie}

[5] Information Systems for Management (->”IEEE Standard Dictionary”)

[6] Interpretive Structural Modeling (->”IEEE Standard Dictionary”)

[7] Industry, Scientific, Medical

[8] Kissimmee, FL, USA -internationale Fughafen-Kennung

[9] Industrial, Scientific, and Military