| Acronym | Definition |
|---|
| SSI➣Server Side Include |
| SSI➣Supplemental Security Income |
| SSI➣Small-Scale Integration |
| SSI➣Social Security Income |
| SSI➣Statens Serum Institut (Denmark) |
| SSI➣Scuba Schools International |
| SSI➣Surgical Site Infection |
| SSI➣Survey Sampling International |
| SSI➣Solid State Imaging |
| SSI➣Small Scale Industries |
| SSI➣Strategic Simulations Inc. |
| SSI➣Server System Infrastructure |
| SSI➣Strategic Studies Institute (US Army War College) |
| SSI➣Sécurité des Systèmes d'Information (French: Information Systems Security) |
| SSI➣SteadyShot Inside (Sony) |
| SSI➣Single System Image (cluster of systems appearing as one system) |
| SSI➣Sensitive Security Information (US DoT) |
| SSI➣Social Security Insurance |
| SSI➣Statens Strålskyddsinstitut (Swedish Radiation Protection Authority) |
| SSI➣Sound Source Interactive, Inc. (California) |
| SSI➣Salt Spring Island (Canada) |
| SSI➣Space Studies Institute |
| SSI➣Shimadzu Scientific Instruments (Shimadzu Corporation) |
| SSI➣Social Services Inspectorate (UK and Ireland) |
| SSI➣Shoulder Sleeve Insignia |
| SSI➣South Sea Imports (quilt distributor; Rancho Dominguez, CA) |
| SSI➣Software and Systems Integration |
| SSI➣Spectral Solar Irradiance (sunlight) |
| SSI➣Security Services International (Delaware) |
| SSI➣Subsystem Interface |
| SSI➣System Software Interrupts |
| SSI➣Size Selective Inlet |
| SSI➣Small Scale Integration |
| SSI➣Single System Image |
| SSI➣Storage Service Interface |
| SSI➣Security Support Provider Interface |
| SSI➣Solid State Ignition |
| SSI➣Serial Synchronized Interface |
| SSI➣Single Sign in |
| SSI➣Server Side Interpreter |
| SSI➣Shared Source Initiative |
| SSI➣Self Support Index |
| SSI➣Student Success Initiative |
| SSI➣ShipConstructor Software, Inc. (Canada) |
| SSI➣Saint Simons Island (place name in Georgia, USA) |
| SSI➣Soil Structure Interaction |
| SSI➣Semaine de la Solidarité Internationale (French: International Solidarity Week) |
| SSI➣Sawtooth Software, Inc. (Orem, UT) |
| SSI➣Solid-State Imager |
| SSI➣Sales Satisfaction Index |
| SSI➣Strålskyddsinstitutet |
| SSI➣Spatial Sciences Institute |
| SSI➣Southern States Insurance (various locations) |
| SSI➣Speculative Sentiment Index (Forex Capital Markets investment tool) |
| SSI➣Système de Sécurité Incendie (French: Fire Safety System) |
| SSI➣Sliding Scale Insulin |
| SSI➣Storage Strategies, Inc. (Springfield, VA) |
| SSI➣Sport Science Institute (National Collegiate Athletic Association) |
| SSI➣Standing Settlement Instruction |
| SSI➣Society of Scribes and Illuminators (UK) |
| SSI➣Sight Savers International |
| SSI➣Semi-Structured Interview (various organizations) |
| SSI➣Sharp Semiconductor Indonesia |
| SSI➣Solid State Interlocking |
| SSI➣Saturn Saab Isuzu (cars) |
| SSI➣Society of Socio-Informatics (Japan) |
| SSI➣Storage Service Interface (software) |
| SSI➣Solid-Solid Interface (chemical engineering) |
| SSI➣School Safety Initiative (various organizations) |
| SSI➣Social Science Index (journal) |
| SSI➣Single Sign-In (authentication) |
| SSI➣Severe Speech Impairment |
| SSI➣Saigon Securities, Inc. (Vietnam) |
| SSI➣Studies in Symbolic Interaction (sociology) |
| SSI➣Serenity Systems International (Lewisville, TX) |
| SSI➣Serial Synchronous Interface |
| SSI➣Size-Selective Inlet |
| SSI➣Signal Strength Indicator |
| SSI➣Silent Spring Institute |
| SSI➣Service Support Internet (Austria) |
| SSI➣Soldier Support Institute |
| SSI➣Stakeholder Satisfaction Index (education) |
| SSI➣Spaceport Systems International |
| SSI➣State Sanitary Inspectorate (health; various locations) |
| SSI➣Sino Strategic International (Australia) |
| SSI➣Ship Station Identification |
| SSI➣Short-Circuited Stub Inductor |
| SSI➣Standard Settlement Instruction |
| SSI➣Scuola Superiore ISUFI (Istituto Superiore Universitario di Formazione Interdisciplinare; Italian: University Institute of Interdisciplinary Education Superior School) |
| SSI➣Smart Start, Inc. (Irving, TX) |
| SSI➣South-South Initiative (WHO Tropical Disease Research) |
| SSI➣Special Service Instruction |
| SSI➣Scandinavian Society for Immunology |
| SSI➣Sustainable Salmon Initiative |
| SSI➣Squalene Synthase Inhibitors |
| SSI➣Satellite Software International |
| SSI➣Summer Student Internship (various schools) |
| SSI➣State-Supported Institution |
| SSI➣Significant Structural Item (aviation) |
| SSI➣Selective Serotonin Inhibitors |
| SSI➣Simpósio sobre Segurança em Informática |
| SSI➣Spectral Sciences, Inc. (Massachusetts) |
| SSI➣Structural Significant Item |
| SSI➣Single-Site Injection |
| SSI➣Secret Sensitive Information |
| SSI➣Static Skeleton Interface (CORBA server-side API) |
| SSI➣Smart Solar International (Japan) |
| SSI➣Self-Service Interface (websites) |
| SSI➣Specialty Skill Identifier |
| SSI➣Submarine Systems, Inc. |
| SSI➣Secure Solutions International |
| SSI➣Same-store Sales Index (Redbook) |
| SSI➣Sirota Survey Intelligence (Purchase, NY) |
| SSI➣Seattle Startup Index (Seattle, WA) |
| SSI➣Simulator Systems International |
| SSI➣Site Screening Investigation |
| SSI➣Stress-Strength Interference (reliability model) |
| SSI➣Staff Sergeant Instructor |
| SSI➣Software Systems Interface |
| SSI➣Special Structural Inspections (aviation) |
| SSI➣Systems and Synchronous, Inc |
| SSI➣Software Solutions Integrated Limited |
| SSI➣Screening Site Investigation |
| SSI➣Sooner Scientific, Inc (Garvin, OK) |
| SSI➣Standing Signal Instruction |
| SSI➣Shared Systems Initiative (Canada) |
| SSI➣Steady-State Irradiation |
| SSI➣Safety Significant Item |
| SSI➣Suspect Site Inspection |
| SSI➣Spastic Society of India |
| SSI➣Scottish Society of Indianapolis (Indianapolis, IN) |
| SSI➣System Standards Inc. (Philippines) |
| SSI➣Science Support Interface |
| SSI➣Schedule Support Impact |
| SSI➣Single Subscriber Interface |
| SSI➣SIM-STIM Interface (interface for having Sims Stimulate C4ISR boxes) |
| SSI➣Structural Safety Inspection |
| SSI➣Source Significant Information |
| SSI➣Summit Safety, Inc (Devens, MA) |
| SSI➣Safe Sex Instructor |
| SSI➣Sponsored Sales Intermediary |
| SSI➣Similar Source Integration |
| SSI➣Soldier System Interface |
| SSI➣Square Spiral Inductor |
| SSI➣Surprise Security Inspection |
| SSI➣Single Source Income |
| SSI➣Safe Sex Initiative |
| SSI➣Source Selection Initiative |
| SSI➣Space Systems Internetting |
| SSI➣Stores Station Indicator |
| SSI➣Synchronous Serial Line Interface |
| SSI➣Sustaining Support Increment |
| SSI➣Significant Schedule Impact |
| SSI➣Smoothing Suppression Indicator |
| SSI➣Section Scan Indicator |
| SSI➣Single Source Integration |
| SSI➣Sub-Surface Investigation |
| SSI➣Sudan Service International |
| SSI➣Synthesis Solutions, Inc. |
| SSI➣Sector Scan/Scanning Indicator |
| SSI➣Salesian Society Incorporated (Australia) |
| SSI➣Single-Source Investments |