Legal Abbreviations and Acronyms
- SIStatutory Instrument
- SIAMSociety for Industrial and Applied Mathematics (Philadelphia, Pennsylvania)
- SICSpacecraft Identification Code
- SICHJanuary
- SIDSpacecraft Identification Number
- SIDSSmall Island Developing States
- SIDSSSmall Island Developing States
- SIFESecond Isccp Field Experiment
- SIG-WAISSpecial Interest Group-Wide Area Information Server
- SILICSilicate
- SIMDSingle Instruction, Multiple Data (system) (processor)
- SJSummary Judgment
- SJVFVeterinary Agricultural Research Council
- SKSaskatchewan
- SLASpecial Libraries Association
- SLARSide-Looking Airborne Radar
- SLBShallow Land Burial
- SLEJFSri Lanka Environmental Journalists Forum
- SLIESStratospheric Limb Infrared Emission Spectrometer
- SLPSea-Level Pressure
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