[1] Software Standardization Initiative (ISO)
[2] Small Scale Integration - in der IC-Technik bis 100 Funktion pro Quadratzentimeter
[3] Serial Signal Interface
[4] SubSystem Interface
[5] Space Studies Institute Princeton
[6] Solid-State Imager (on Galileo)
[7] Storage-to-Storage Instruction (->"IEEE Standard Dictionary")
[8] Steady State Irradiation (->"IEEE Standard Dictionary")
[9] National Institute of Radiation Protection (SWE) - Schwedisches Strahleninstitut (siehe MPR II)
[10] Space Services Incorporated
[11] Sun Service Incorporated
[12] System Software Interface (Japanese ISO Initiative)
[13] Brunswick-McKinnon, GA, USA -internationale Fughafen-Kennung