Your abbreviation search returned 95 meanings
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| Rank Abbr. | Meaning | |
|---|---|---|
| SIR | School of International Relations (Iran) | |
| SIR | Society of Interventional Radiology | |
| SIR | Staten Island Railway (NY, formerly SIRT, Staten Island Rapid Transit) | |
| SIR | Self-Insured Retention | |
| SIR | Summary Information Return | |
| SIR | Spaceborne Imaging Radar | |
| SIR | Social Information Retrieval (various organizations) | |
| SIR | Scholar in Residence | |
| SIR | Social Indicators Research (various organizations) | |
| SIR | Shooting Incident Reconstruction (forensics) | |
| SIR | Security Intelligence Report (Microsoft threat analysis) | |
| SIR | Standardized Incidence Ratio | |
| SIR | Serial Infrared | |
| SIR | Signal-to-Interference Ratio | |
| SIR | Short Interest Ratio (finance) | |
| SIR | Surface Insulation Resistance | |
| SIR | Shuttle Imaging Radar | |
| SIR | Savings-to-Investment Ratio | |
| SIR | Statistical Inventory Reconciliation | |
| SIR | Specific Information Requirement (US DoD) | |
| SIR | Statement of Intent to Register (College) | |
| SIR | Screening Information Request (US FAA; same as RFP) | |
| SIR | Supplemental Inflatable Restraint | |
| SIR | Silent Information Regulator | |
| SIR | Serious Incident Report | |
| SIR | Single Instance Repository | |
| SIR | Statutory Invention Registration | |
| SIR | Society of Insurance Research | |
| SIR | Singapore Infantry Regiment | |
| SIR | Seattle International Raceway | |
| SIR | Special Investment Region (Dholera, Gujarat, India) | |
| SIR | System Impedance Ratio (power systems) | |
| SIR | Susceptible-Infected-Removed | |
| SIR | Social Investigation Report (Juvenile Justice Act; India) | |
| SIR | Société Ivoirienne de Raffinage (Abidjan, Ivory Coast) | |
| SIR | Security Incident Report | |
| SIR | Southeastern Institute of Research (ad survey firm) | |
| SIR | Starting Independent Researcher (European Research Council grant) | |
| SIR | Standard Indonesian Rubber | |
| SIR | Specific Insulation Resistance (electrical engineering) | |
| SIR | Sons In Retirement (Northern California retired men's luncheon club) | |
| SIR | Scientific Information Retrieval | |
| SIR | Selected Ion Recording (mass spectrometry) | |
| SIR | Singapore Immigration and Registration | |
| SIR | Statistical Information Retrieval | |
| SIR | Safeguards Implementation Report | |
| SIR | Stepped Impedance Resonator | |
| SIR | Speech Intelligibility Rating | |
| SIR | Safety Investigation Report | |
| SIR | Sequential Importance Resampling | |
| SIR | Sigma Iota Rho (international studies honorary society) | |
| SIR | Single Interactive Repository (computing) | |
| SIR | System Investigation Request | |
| SIR | Session Initiation Request | |
| SIR | Sample Inspection Report (engineering prototype) | |
| SIR | Selective Integrated Rail System (law enforcement product) | |
| SIR | Snow and Ice on Runway | |
| SIR | Supervised Intensive Restitution (Alabama prison program) | |
| SIR | Sorry If Repost | |
| SIR | Simulated Intelligence Robotics | |
| SIR | System Integration Review | |
| SIR | Spatial Impulse Response | |
| SIR | System Incident Report | |
| SIR | Submarine Intermediate Reactor | |
| SIR | Service Information Request | |
| SIR | Switched Integrated Rectifier (three phase transformer-rectifier power supply) | |
| SIR | Simple Indexing and Retrieval | |
| SIR | Standard Information Retrieval unit | |
| SIR | Systems Integrated Research (UK educational software firm) | |
| SIR | Standard-Issue Information Retrieval Unit (Invader Zim) | |
| SIR | Smooth Interpersonal Relationship | |
| SIR | Supplier Information Request | |
| SIR | Source Initiated Reservation | |
| SIR | Society of Individual Rights (1960s San Francisco homophile group) | |
| SIR | Skill Independent Regional (Visas) | |
| SIR | Scheduled Inspection and Repair | |
| SIR | Site Inspection Request | |
| SIR | Service Implementation Repository | |
| SIR | Semiannual Inventory Report | |
| SIR | Smith Industrial Rubber | |
| SIR | Software Incident Report | |
| SIR | Sooner International Raceway | |
| SIR | Sensitive, Intermediate, Resistant | |
| SIR | Safety Interlock Relay | |
| SIR | Set Iron Rod | |
| SIR | Sveriges Inredningsarkitekters Riksförbund | |
| SIR | Search, Inspection & Recovery | |
| SIR | Society of Independent Representatives Inc | |
| SIR | Special Inspection Requirement | |
| SIR | Sequential Independent Reviews | |
| SIR | Stored Information Retriever | |
| SIR | Surveillance Information Retrieval (gaming) | |
| SIR | Supervisor Investigation Reports (insurance) | |
| SIR | Special Investigative Requirement | |
| SIR | Scramble Intercept Recovery | |
Note: We have 250 other definitions for SIR in our Acronym Attic