English abbreviations from sii to sima
- SII (Sania Ramel Airport)
- SIIE (Summer Institute on International Education)
- SIIP (Site Integration Installation Plan)
- SIIT (Saskatchewan Indian Institute of Technologies (Canadian university))
- SIJ (Siglufjörður Airport)
- SIK (Sikeston Memorial Municipal Airport)
- SIL (Supported Independent Living)
- SILA (Sustainable Independent Living And Access)
- SILAC (Stable Isotope Labeling with Amino Acids in Cell Culture)
- SILAS (Student Information Lookup Access System)
- SILC (Shrewsbury International Language Centre)
- SILFI (SanItasi Lingkungan dan FItoteknologi)
- SILK (Speech Information Language Knowledge)
- SILS (Standard for Inter-operable LAN Security)
- SIM ((telescope) Space Interferometry Mission, a planned optical space telescope that will be used to measure distances to stars)
- SIMA (System For Identifying Motivated Abilities)
