| OSR | Obital Ship Repair 
| Others |
| OSR | Oblivion Stutter Remover
| Others |
| OSR | Ocean Sentry Refresh
| Others |
| OSR | Oceanside Street Rods
| Others |
| OSR | OEM (Original Equipment Manufacturer) Service Release
| Others |
| OSR | OEM (Original Equipment Manufacturer)Service Release
| Others |
| OSR | OEM Service Release
| Others |
| OSR | Office for Senior Resources
| Others |
| OSR | Office for Sponsored Research
| Others |
| OSR | Office For Survey Research
| Others |
| OSR | Office of School Readiness
| Others |
| OSR | Office of Science and Research
| Others |
| OSR | Office of Social Responsibility
| Others |
| OSR | Office of Sponsored Research
| Others |
| OSR | Office of State Register
| Others |
| OSR | Office of State Revenue
| Others |
| OSR | Office of Student Research
| Others |
| OSR | Office of Student Returns
| Others |
| OSR | Office of Survey Research
| Others |
| OSR | Office Service Release
| Others |
| OSR | Offshore Special Regulations
| Others |
| OSR | Oh S*** Run
| Others |
| OSR | Ohio State Reformatory
| Others |
| OSR | Oil Seed Rape
| Others |
| OSR | Oil Spill Remediation
| Others |
| OSR | Oil Spill Response
| Others |
| OSR | Ol' Skool Rodz
| Others |
| OSR | Old School Renaissance
| Others |
| OSR | Old School Revival
| Others |
| OSR | Old School Roleplaying
| Others |
| OSR | Old School Rules
| Others |
| OSR | Old Spanish Road
| Others |
| OSR | Old Stage Route
| Others |
| OSR | On Stack Replacement
| Others |
| OSR | On-Site Rules
| Others |
| OSR | One Sentence Review
| Others |
| OSR | One Shot Rise
| Others |
| OSR | Online Star Register
| Others |
| OSR | Online Student Records
| Others |
| OSR | Online Syllabus Repository
| Others |
| OSR | Ontario Student Record
| Others |
| OSR | Open Side Ruled
| Others |
| OSR | Open Sky Roof
| Others |
| OSR | Open Source Rebellion
| Others |
| OSR | Open Source Robot
| Others |
| OSR | Open Space Reservation
| Others |
| OSR | Open Space Reservation ( In real estate)
| Others |
| OSR | Open Standards Requirement
| Others |
| OSR | Open Study Room
| Others |
| OSR | Open System Reference
| Others |
| OSR | Open Systems Resources, Inc.
| Others |
| OSR | Operateur Service Rapid
| Others |
| OSR | Operating System Resource
| Others |
| OSR | Operating Systems Review
| Others |
| OSR | Operational Safety Requirement
| Others |
| OSR | Operational Summary Report
| Others |
| OSR | Operations Support Room
| Others |
| OSR | Optical Scanning Recognition
| Others |
| OSR | Optical Service Router
| Others |
| OSR | Optical Solar Reflector
| Others |
| OSR | Optical Switch Router
| Others |
| OSR | Oracle Service Registry
| Others |
| OSR | Orchard Street Runners
| Others |
| OSR | Order Storage and Retrieval
| Others |
| OSR | Order Storage Retrieval
| Others |
| OSR | Organization of Student Representatives
| Others |
| OSR | Organization Systems Renewal
| Others |
| OSR | Organizational Safety Reliability
| Others |
| OSR | Original Seen & Returned
| Others |
| OSR | Original System Reference
| Others |
| OSR | Orthopedic Sport Rehab
| Others |
| OSR | Ostrava, Czech Republic
| Others |
| OSR | Out Station Reporter
| Others |
| OSR | Outreach Student Representative
| Others |
| OSR | Over Sampling Rate
| Others |
| OSR | Over-Sampling Ratio
| Others |
| OSR | Overseas Service Ribbon
| Others |
| OSR | Own-Source Revenue(s)
| Others |
| OSR | Oxidative Stress Relief
| Others |