English abbreviations from si to sic
- SI (Slovenia (ISO 3166 and FIPS 10-4 country code digram))
- si — (s) Sinhalese language (ISO 639 (1 code))
- SI/TA (Shut In/Temporarily Abandoned)
- SIA (Xiguan Airport)
- SIAA (Societas Iuridica Antiliana et Arubana)
- SIAC (School Improvement Accountability Committee)
- SIAD (Sierra Army Depot)
- SIAGL (Survey Instrument Azimuth Gyroscope Lightweight)
- SIAS (Slightly Increased Attack Speed)
- SIASC (Shanmuga Industries Arts and Science College)
- SIASEU (Society Of Indian Alumni for Swedish and European Universities)
- SIAST (Saskatchewan Institute of Applied Science and Technology)
- SIB (Special Investigations Board)
- SIBME (Singapore Informatics and Business Management Education Ltd.)
- sibs (siblings)
- SIC (Second in Command)