What does SI stand for?

Your abbreviation search returned 148 meanings

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Rank	Abbr.	Meaning
******	SI	System Information
******	SI	System Information (Norton Utilities)
******	SI	Statutory Instrument (UK Legislation term)
******	SI	Slovenia (international code)
******	Si	Silicon
******	SI	Service Information
******	SI	School of Information (university)
******	SI	Self-Injury
******	SI	Square Inch(es)
******	SI	Smithsonian Institution
******	SI	Supplemental Instruction
******	SI	Signal Integrity
******	SI	Spark Ignition
******	SI	Shift In
******	SI	Slightly Included (second lowest quality of diamond)
******	SI	Serious Injury
******	SI	Staten Island
******	SI	Sistema Informativo
******	SI	Systèmes d'Information
******	SI	Standardization (Flight) Instructor
******	SI	System International
******	SI	Site Investigation
******	SI	Sensory Integration
******	SI	Sexual Intercourse
******	SI	System Interface
******	SI	Still Image
******	SI	Shut-In
******	SI	Small Intestine
*****	SI	Seriously Ill
*****	SI	Self Inflicted
*****	SI	Scientific Investigation
*****	SI	Sistema de Informação
*****	SI	Sacroiliac
*****	SI	Singapore Idol (Singapore TV show)
*****	SI	Software Item
*****	SI	Simply Irresistible (song)
*****	SI	Speaker Independent
*****	SI	Science and Industry
*****	SI	Sacroiliac Joint
*****	SI	Siena, Toscana (Italian province)
*****	SI	Site Inspection
*****	SI	Système International d'Unités (international system of units based on the Meter, Kilogram, Second, Ampere, Kelvin, Candela, and Mole)
*****	SI	Swap-In
*****	SI	Soroptimist International
*****	SI	Sub Inspector
*****	SI	Simple Interest
*****	SI	Synergos Institute (San Diego, CA)
*****	SI	Softice (debugger)
*****	SI	Service Index
*****	SI	Swarm Intelligence
*****	SI	Sudden Impact (movie)
*****	SI	Source Index
*****	SI	Suicidal Ideation
*****	SI	Scientific Instrument
*****	SI	Step-Index
*****	SI	Service Indicator (SS7 SCCP)
*****	SI	Situationist International (governing body of political dissidents circa 1968)
*****	SI	SPARC International, Inc.
*****	SI	Semiconductor International
*****	SI	Shared Interest (New York, NY)
*****	SI	Side Information
*****	SI	Special Instruction
****	SI	Schweizer Informatiker Gesellschaft (Zurich, Switzerland)
****	SI	Shrouded Isles (gaming, Dark Age of Camelot add-on)
****	SI	Silicon Image, Inc
****	SI	Specific Impulse (measure of efficiency of rocket engines)
****	SI	Surface Impoundment
****	SI	Special Intelligence
****	SI	Special Inspection
****	SI	Saturation Index
****	SI	Signal Interference
****	SI	Science Instrument (Hubble Telescope)
****	SI	Soil Investigation
****	SI	Similarity Index
****	SI	Strategic Investor
****	SI	Speech Impairment
****	SI	Shift-Invariant
****	SI	Salt Institute
****	SI	Solution Implementation
****	SI	Summons Issued
****	SI	Sarcasm Intended
****	SI	Systematic Innovation
****	SI	Sailing Instruction
****	SI	Security Inspector
****	SI	Solving International
****	SI	Strange Interlude (Eugene O'Neill book)
****	SI	Sensitivity Information
****	SI	Self-Insertion (fan fiction)
****	SI	Shipping Instruction
****	SI	Siilinjärvi (Finnish)
****	SI	Sexually Inappropriate
****	SI	Secondary Injection
****	SI	Solar Influences
****	SI	Scalable Infrastructure
****	SI	Skill Identifier (US Army)
****	SI	Sucrase-Isomaltase Deficiency
****	SI	Settlement Instruction
****	SI	Surveillance and Intelligence
***	SI	Self Isolation
***	SI	Safeguards Information
***	SI	Safe Intake
***	SI	Standardization and Interoperability
***	SI	Spiritual Intervention (religious doctrine)
***	SI	Surveillance Index
***	SI	Straight-In Approach
***	SI	Spray Injection
***	SI	Sergeant Instructor
***	SI	Saint Ignatius College Preparatory (San Francisco, California)
***	SI	Smoothness Index
***	SI	Society for India (Cornell University)
***	SI	Summary Investigation
***	SI	Scintillation Index
***	SI	Supporting Installation
***	SI	Samahang Ilokano (Filipino college organization)
***	SI	Solar Inertial
***	SI	Supplementary Insulation
***	SI	Sponsor Identification
***	SI	Sport Injected (Honda)
***	SI	Surveyor Intern
***	SI	Simple Interference
**	SI	Sector Iridectomy (partial removal of the iris of the eye)
**	SI	Septuagint Institute (Trinity Western University, Canada)
**	SI	Selective Interchange
**	SI	Semiconductor Ignition
**	SI	Safety/Site Inspection
**	SI	Shadow Instruction (computer instruction set)
**	SI	Sharma Industries
**	SI	Somatosensory Receiving Area (in parietal lobe of cortex)
*	SI	Spokane International Railroad Company
*	SI	Signaling Intelligence
*	SI	Sippy International
*	Si	Normalized Subthreshold Swing
*	SI	Slave Illuminator
*	SI	Systems Industries, Incorporated
*	SI	Societatis Iesu, Latin for Society of Jesus, Jesuits (religious order)
*	SI	Secretaría Indigenista (Spanish: Indigenous Secertariat)
*	SI	Self-Incompatibility (botany)
*	SI	Shadow Image
*	SI	South Island (New Zealand)
*	SI	Sports Illustrated
*	SI	Sports Interactive (game)
*	SI	Systems Integration
*	SI	Systems Integrator
*	SI	Systems Intelligence (psychological theory)
*	SI	System Integrator
*	SI	Swine Influenza
*	SI	Superimpose
*	SI	Strategic Initiative (management)
Note: We have 109 other definitions for SI in our Acronym Attic

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