OSI

• Alans
• Ido-Osi
• OSI (band)
• OSI Group
• OSI Pharmaceuticals
• OSI Restaurant Partners
• OSI Systems
• OSI model
• OSI protocols
• OSIsoft
• Objective Systems Integrators
• Oblates of St. Joseph
• Office of Scientific Intelligence
• Office of Scientific Intelligence
• Office of Secret Intelligence
• Office of Special Investigations (Government Accountability Office)
• Office of Special Investigations (United States Department of Justice)
• Office of Special Investigations (disambiguation)
• Office of Strategic Influence
• Office of Strategic Influence (album)
• Officine Stampaggi Industriali
• Ohio Scientific
• On-Site Inspection
• Open Society Institute
• Open Society Institute-Baltimore
• Open Source Initiative
• Open Space Institute
• Open Systems Interconnection
• Open Systems International
• Open switching interval
• Orchestra della Svizzera Italiana
• Order of the Star of Italy
• Ordnance Survey International
• Ordnance Survey Ireland
• Origin Systems
• Osi (ancient tribe)
• Osi Rhys Osmond
• Osi Umenyiora
• Osijek Airport
• Osis (disambiguation)
• Otto-Suhr-Institut
• Out-of-station interchange
• Republic of Korea Air Force
• Semigallia
• Siderella
• U.S. Air Force Office of Special Investigations
• United States Office of Research Integrity
• Ősi