List of Acronyms and Initialisms: S - SI

SI

  • si — (s) Sinhalese language (ISO 639-1 code)
  • Si — (s) Silicon
  • SI
    • (s) Slovenia (ISO 3166 and FIPS 10-4 country code digram)
    • (i) Socialist International
    • Sports Illustrated
    • Système International (French, International System of Units)
  • SIA — (s) Singapore Airlines (ICAO code)
  • SIA — (i) Survivors of Incest Anonymous
  • SIAM — (i) Society for Industrial and Applied Mathematics
  • SIC — (a) Standard Industrial Classification
  • SICS — (a/i) Swedish Institute of Computer Science
  • SIDS — (a) Sudden Instant Death Syndrome
  • SIDU — (i) select, insert, delete, update. See Create, read, update and delete
  • SIF — (i) Selective Identification Feature
  • SIFF — (i) Successor IFF
  • SIG
    • (i) Schweizerische Industrie Gesellschaft (German, "Swiss Industry Company"). See also SIG Sauer, a firearms manufacturer spun off from the aforementioned company in 2000.
    • (p) .signature (UNIX shell/Internet standard file name)
    • (a/i) Special Interest Group
  • SIGCAT — (a) Special Interest Group for CD-ROM Applications and Technology
  • SIGINT — (p) Signals Intelligence
  • SIGMET — (p) Significant Meteorological Information
  • SIIT
    • (i) Saskatchewan Indian Institute of Technologies (Canadian university)
    • Sirindhorn International Institute of Technology (Thai university)
    • Stateless IP/ICMP Translation algorithm
  • SIMAC — (a) Semantic Interaction with Music Audio Contents
  • SIMLAS — (p) Soldier Integrated Multipurpose Laser System
  • SIMM — (a) Single In-line Memory Module
  • SIMNET — (p) SIMulator NETwork, later SIMulation NETwork
  • SIMNET-D - (p) SIMNET-Developmental
  • SIMP — (a) Strongly Interacting Massive Particle
  • SIMPLE
    • (a) Satellite Interactive Multimedia Platform for Low-cost Earth stations
    • (p) Savings Incentive Match Plan for Employees (as used in SIMPLE IRA)
    • (a) Standard Interface for Multiple Platform Link Evaluation (NATO STANAG 5602)
  • sin — (s) Sinhalese language (ISO 639-2 code)
  • SIN — (a) Social Insurance Number (Canada)
  • SINCGARS — (p) SINgle Channel Ground and Airborne Radio System
  • SIP
    • (i) Session Initiation Protocol
    • State Implementation Plan
    • System Improvement Program
    • Systematic Investment Plan
  • SIPP — (a) Self-Invested Personal Pension
  • Siri – (a) Speech Interpretation and Recognition Interface (Apple iOS software)
  • SIRI – (a) Service Interface for Real Time Information
  • SiS — (i) Silicon Integrated Systems
  • SIS — (i) UK Secret Intelligence Service (also known as MI6)
  • SISO
    • (a) Simulation Interoperability Standards Organization
    • Society of Independent Show Organizers
  • SIW — (i) Simulation Interoperability Workshop
  • SIYSS — (i) Stockholm International Youth Science Seminar

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