English abbreviations from sirads to siso
- SIRADS (Stored Imagery Repository and Dissemination System)
- SIRB (Senior's Information & Resource Bureau)
- SIRC (Social Issues Research Centre)
- SIRCUS (Standard Information Retrieval Capability for Users)
- SIRD (Site Index Report Document)
- SIRDS (Single Image Random Dot Stereogram)
- Siri (Speech Interpretation and Recognition Interface (Apple iOS software))
- SIRIJ (Semiconductor Industry Research Institute of Japan)
- SIRMO (Senior Information Resources Management Official)
- SIRR (Software Integration Readiness Review)
- SIRRA (Sleep-Induction/Rapid Re-Awakening)
- SIRS (Social Issues Resource Series)
- SIRTF ((telescope) Space InfraRed Telescope Facility or Shuttle InfraRed Telescope Facility, older names for the Spitzer Space Telescope)
- SIRU (Southern Inland Rugby Union)
- SIS (Shaken infant syndrome)
- SISD (Single Instruction, Single Data)
- SISFET (Semiconductor-Insulator-Semiconductor Field Effect Transistor)
- SISMS (Standard Integrated Support Management System)
- SISO (Simulation Interoperability Standards Organization)
