SIIS

AcronymDefinition
SIISStatewide Immunization Information System
SIISShanghai Institute for International Studies (international relations research organization; Shanghai, China)
SIISState Industrial Insurance System (Nevada)
SIISSouthwestern Insurance Information Service
SIISSubsea Instrumentation Interface Standardisation (electronics equipment protocol)
SIISSpacecraft/Instrument Interface Simulator
SIISSeikei Institute for International Studies (Seikei University; Japan)
SIISStanford University's Institute for International Studies