| Acronym | Definition |
|---|
| SIA➣Security Industry Association |
| SIA➣Semiconductor Industry Association |
| SIA➣Securities Industry Association (merged into Securities Industry & Financial Markets Association) |
| SIA➣Security Industry Authority (UK) |
| SIA➣Sistemi Informativi Aziendali (Italian: Business Information Systems, Ltd.) |
| SIA➣Smithsonian Institution Archives (est. 1846) |
| SIA➣Services to Improve Access (Ministry of Health; New Zealand) |
| SIA➣Subaru of Indiana Automotive, Inc. (Lafayette, IN) |
| SIA➣Stable Isotope Analysis (biology) |
| SIA➣Senior Internal Auditor (accounting; various companies) |
| SIA➣Sustainability Impact Assessment (trade) |
| SIA➣Société des Ingénieurs de l'Automobile (French: Society of Automotive Engineers) |
| SIA➣Seoul Institute of the Arts (Seoul, South Korea) |
| SIA➣Salon International de l'Agriculture (French: International Exhibition of Agriculture) |
| SIA➣Social Impact Assessment |
| SIA➣Servicios de Información y Asesoría (Spanish: Information and Advisory Services; Guatemala) |
| SIA➣Scaffold Industry Association |
| SIA➣Social Insurance Agency (various locations) |
| SIA➣Schweizerischer Ingenieur- und Architektenverein |
| SIA➣Singapore Institute of Architects |
| SIA➣Scsi Industry Association |
| SIA➣Symantec Intruder Alert |
| SIA➣Subaru Isuzu Automotive |
| SIA➣Starting Instruction Address |
| SIA➣Subaru of Indiana Automotive |
| SIA➣Semiconductor Industries Association |
| SIA➣Shenyang Institute of Automation (est. 1958; China) |
| SIA➣Spinal Injury Association (various locations) |
| SIA➣Safety Institute of Australia |
| SIA➣System Impact Assessment |
| SIA➣Satellite Industry Association |
| SIA➣Société Suisse des Ingénieurs et des Architectes |
| SIA➣Society for Industrial Archeology |
| SIA➣Sam I Am (band) |
| SIA➣Security Integration Architecture |
| SIA➣SOCO International Plc (UK) |
| SIA➣Survivors of Incest Anonymous |
| SIA➣Societa Italiana di Andrologia (Italian) |
| SIA➣Summit International Awards (marketing communications industry) |
| SIA➣Service de l'Information Aéronautique (French: Aeronautical Information Service; General Directorate of Civil Aviation; France) |
| SIA➣Professional Ski Instructors Association of Japan |
| SIA➣Stuck in Active (Refers to DUAL-3-SIA error message of EIGRP) |
| SIA➣Securities Institute of America |
| SIA➣Solutions for Intelligence Analysis (various organizations) |
| SIA➣Singapore International Airlines (ICAO code) |
| SIA➣Servizio Informazioni Aeronautiche (Italian: Air Intelligence Service) |
| SIA➣Subject Information Access |
| SIA➣Sorry in Advance |
| SIA➣Spokane International Airport |
| SIA➣Società Interbancaria per l'automazione (Interbank Association for Automation) |
| SIA➣Shareware Industry Awards |
| SIA➣Sport Industry Awards (UK) |
| SIA➣Sequential Injection Analysis |
| SIA➣Saitama International Association (Japan) |
| SIA➣Statistical Image Analysis (mathematics) |
| SIA➣Staffing Industry Analysts, Inc. (Los Altos, California) |
| SIA➣Supplementary Immunization Activities |
| SIA➣Schools Insurance Authority (Sacramento, CA) |
| SIA➣Students in Action |
| SIA➣Swiss Insurance Association |
| SIA➣Simplex Investment Advisors (Japan) |
| SIA➣Società Italiana di Artroscopia |
| SIA➣Special Interest Alien |
| SIA➣Sorry I Asked (chat) |
| SIA➣Sugar Industry Authority (Jamaica) |
| SIA➣Ski Industries America |
| SIA➣Società Italiana di Arboricoltura |
| SIA➣Spaceweek International Association |
| SIA➣Service in Information & Analysis Limited (London, UK) |
| SIA➣Solvents Industry Association (London, UK) |
| SIA➣Sabiedriba ar Ierobezotu Atbildibu (Latvian: Limited Liability Company) |
| SIA➣Serial Interface Adaptor |
| SIA➣Safety Institute of America (Lexington, SC) |
| SIA➣Syrian Investment Agency |
| SIA➣Singapore International Airport |
| SIA➣Structural Inventory & Appraisal (engineering; various locations) |
| SIA➣Session Initiation Application |
| SIA➣Stable Implementation Agreements (Bellcore) |
| SIA➣Sistema de Información Aduanero (Spanish: Customs Information System) |
| SIA➣Socially Intelligent Agent |
| SIA➣Sudden Ionospheric Absorption (astrophysics) |
| SIA➣Standard Instrument Approach |
| SIA➣Shareware Industry Association |
| SIA➣Soldiers in Arms (gaming clan) |
| SIA➣Starfleet Intelligence Agency (Star Trek) |
| SIA➣System Interface Agreement |
| SIA➣State Implementing Agency (India) |
| SIA➣Salary Increase Authorization |
| SIA➣Statistical Implicative Analysis |
| SIA➣Storage Instantaneous Audimeter |
| SIA➣Station Interface Adapter |
| SIA➣Scalable Interconnect Architecture |
| SIA➣Swap-In Arrears |
| SIA➣Sciences et Initiatives pour l'Afrique (French: Science and Initiatives for Africa) |
| SIA➣Sistema de Informação Aduaneiro (Portuguese: Customs Information System) |
| SIA➣Scanner Interface Assembly |
| SIA➣Swiss Industrial Abrasive |
| SIA➣Screen Imagination Agency |
| SIA➣Sentral Sykehuset I Akershus |
| SIA➣Special Interface Adapter |
| SIA➣System Interface Assembly |
| SIA➣Student Initiated Assignment |
| SIA➣Sociedad Argentina de Inmunologia |
| SIA➣Shuttle Induced Atmosphere (US NASA) |
| SIA➣Services Internetworking Architecture (Sedona) |
| SIA➣Signal Indicated Alarm |
| SIA➣Self Initiated Activity |
| SIA➣Syra Intergalactic Arms (gaming) |
| SIA➣Soroptimists International of the Americas |
| SIA➣Structured Improvement Activity |
| SIA➣Startegic Issues Analysis |
| SIA➣Specialized Individual Assistance |
| SIA➣Special Intelligence Australia |
| SIA➣Supervision, Inspection and Administration (US Army) |
| SIA➣Strategic Internet Alliance |
| SIA➣Standardized IDRS/CFOL Access |
| SIA➣Sudanese Institute of Architects |
| SIA➣Strategic Integral Approach |