Organizations
- Serving In Mission (formerly Sudan Interior Mission), a Christian mission organization
- Servizio Informazioni Militari, a former Italian military intelligence organization
- Servicio de investigación Militar, a former Spanish military intelligence organization
- Singapore Institute of Management, a business school
- SIM University, a private university in Singapore
- Society for Information Management
- Studio for Interrelated Media, an academic concentration at the Massachusetts College of Art
- Servicio de Inteligencia Militar, a former Dominican intelligence operation
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