| Acronym | Definition |
|---|
| SIM | Simulator |
| SIM | Simulation |
| SIM | Systems Insight Manager (HP) |
| SIM | Subscriber Identity Module (ETSI GSM technical specification) |
| SIM | Serving in Mission |
| SIM | Singapore Institute of Management |
| SIM | Security Information Management |
| SIM | Society for Information Management |
| SIM | Subscriber Identification Module (PCS) |
| SIM | Selected Ion Monitoring |
| SIM | Space Interferometry Mission |
| SIM | Sistema Interamericano de Metrologia (Inter-american Metrology System) |
| SIM | Sorry I'm Late |
| SIM | Social Influence Marketing |
| SIM | Simple Instant Messenger |
| SIM | Society for Industrial Microbiology |
| SIM | Security Information Manager |
| SIM | Strategic Information Management |
| SIM | Sudan Interior Mission |
| SIM | Servicio de Inteligencia Militar (Spanish: Military Intelligence Service; various locations) |
| SIM | Set Initialization Mode (HDLC) |
| SIM | Systems in Motion |
| SIM | Serial Interface Module |
| SIM | Security Incident Management |
| SIM | System Integration Module |
| SIM | Single-Ion Monitoring |
| SIM | Society for the Internet in Medicine |
| SIM | Surat Izin Mengemudi (Indonesian driving license) |
| SIM | Store Inventory Management |
| SIM | Service Impact Manager (BMC Software) |
| SIM | Systems Integration Management |
| SIM | Systèmes d'Information et Management (French) |
| SIM | Scanning Ion Microscope |
| SIM | System Interface Module |
| SIM | Serialized Item Management (US DoD) |
| SIM | Source Independent Measurement (acoustical or electronic systems) |
| SIM | Società Italiana Di Malacologia |
| SIM | Stress-Induced Martensite |
| SIM | Servizio Informazioni Militari (Italian: Military Intelligence Service; 1925-1945; Italy) |
| SIM | Service d'Informatique Médicale (French: Medical Informatics Service; Switzerland) |
| SIM | Society of Industrial Microbiology |
| SIM | Security Identity Module (cell phone usage) |
| SIM | Service Impact Management (BMC software) |
| SIM | Société Immobilière de Mayotte (French: Public Estate Agency of Mayotte; France) |
| SIM | Service d'Intervention Sur Mesure (French: Service Tailored Interventions) |
| SIM | Services in the Internal Market |
| SIM | Symantec Incident Manager |
| SIM | Signal Interface Module |
| SIM | Stress-in-Motion (road safety technology) |
| SIM | Stichting Inzichts Meditatie |
| SIM | Service Interaction Manager |
| SIM | Supplier Improvement Metrics |
| SIM | Serials in Microform |
| SIM | Society for the Increase of the Ministry |
| SIM | System Integration Manager |
| SIM | Single Inline Module |
| SIM | Semantic Information Manager |
| SIM | Service Information Message |
| SIM | Selected Item Management |
| SIM | Synchronization Interface Module (Telabs) |
| SIM | Subscription Identity Module |
| SIM | Service Industry Marketing |
| SIM | Skochinsky Institute of Mining (Russia) |
| SIM | Scientific Instruments Module (Apollo program) |
| SIM | Sparse Iterative Method |
| SIM | Sprint Instant Message |
| SIM | Section of Integrative Medicine (Albuquerque, NM) |
| SIM | Spectral Information Measure |
| SIM | Sales in Minutes |
| SIM | Societé Internationale Missionaire (French) |
| SIM | Service Ingénierie des Matériaux (French: Service Engineering Materials) |
| SIM | System Impact Message |
| SIM | Sound Intensity Meter |
| SIM | Shore Infrastructure Modernization |
| SIM | Sensor Interaction Model |
| SIM | Servizio Informazione Segreto (Italian Secret Service in WWII) |
| SIM | Special Interest Message |
| SIM | Stack Interface Module |
| SIM | Systems & Information Map |
| SIM | Submarine Intended Movement |
| SIM | Salon International du Meuble (French: International Furniture Fair) |
| SIM | Spectral Irradiance Model |
| SIM | Switch Input Matrix |
| SIM | Screened Images Multimedia, Inc. |
| SIM | Système d'Informations Marketing (French: Information System Marketing) |
| SIM | Six-Inch Instrument Manipulator |
| SIM | Systems Integration Manual |
| SIM | Sensor Input/Interface Module |
| SIM | Speakeasy INFOSEC Model |
| SIM | Special Instrumented Missile |
| SIM | Sociedad de Inversiones Mobiliarias |
| SIM | Syrasoft Internet Manager (Syrasoft LLC) |
| SIM | Service Identification Methodology (Service Oriented Architecture) |
| SIM | Source Interlink Media (Bonita Springs, FL) |
| SIM | Sunday Inquirer Magazine |
| SIM | Society for International Ministries |
| SIM | System Identity Manager (software) |
| SIM | Silhouette Intimate Moments (now Silhouette Romantic Suspense) |
| SIM | Secondary Ion Mass (chemistry) |
| SIM | Staff for Installation Management (US Army) |