OCS

• Amiga Original chipset
• Carbonyl sulfide
• Federation of Old Cornwall Societies
• Microsoft Office Communications Server
• OC (disambiguation)
• OCS (television)
• OCS Inventory
• Obsessive-compulsive syndrome
• Ocean Colour Scene
• Office of Community Services
• Office of the Chief Scientist (Australia)
• Officer Candidate School
• Oklahoma Christian School
• Old Church Slavonic
• Old Cliftonian Society
• On course side
• Online charging system
• Ontario Cannabis Retail Corporation
• Opelika City Schools
• Open Collaboration Services
• Operational Combat Series
• Oral corticosteroid
• Outer Continental Shelf
• Overhead contact system
• Senator O'Connor College School
• Thee Oh Sees
• Öcs