sort by Rank | Alpha
| Possible Meanings | Rank |
| Online Survey Certification and Reporting | *** |
| Organisation for Sickle Cell Anaemia Research | *** |
| Open Source Cluster Applications Resources | *** |
| One Stop Credentialing and Registration | *** |
| Open Source Clinical Application Resource | *** |
| Open Signal Computing and Analysis Resource | *** |
| Ocean Surface Current Analyses Real | *** |
| Office Service Charge Analysis Report | *** |
| Orbiting Satellites Carrying Amateur Radio | ** |
| onco-specific complex of autoimmune responses | ** |
| Oregon State Conversational Aid to Research | ** |
| Online Survey and Certification Reporting | ** |
| Orbiting Sattelite Carring Amateur Radio | ** |
| On-Line Survey Certification of Automated Records | ** |
| On-Line Survey, Certification, and Reporting System | ** |
| One Stop Centre for Advice and Resources | ** |
| Objective Subjective Correlation and Results | ** |
| Orbital Satellites Carrying Amateur Radio | ** |
| Oil Spill Cleanup and Response | ** |
| Out of School Care Recreation | ** |
| Ocean State Cleanup and Recycling | ** |
| Orbital Satellite Carrying Amateur Radio | ** |
| Ocean Sediment Carbon Aerobic Reactor | ** |
| One Stop Community Access Roadshow | ** |
| Office of Student Creative Activities and Research | ** |
| Oil Spill Contingency and Response | ** |
| Ottawa South Community Association Review | ** |
| Oil Spill Containment and Response | ** |
| Office Supply Collection and Reuse | ** |
| Open School Courses and Resources | ** |
| Ocean Surface Current Analysis Real | ** |
| Ohio State Catalog for Automated Retrieval | ** |
| Open Standard Codes and Routines | * |
| Online Scholar Classes and Resources | * |
| Online Source for Career Advancement and Retention | * |
| Online System for Commentary and Response | * |
| Open Systems Core Avionics Requirements | * |
| Orbit Satellite Carrying Amateur Radio | * |
| Overly Sexual Catholic Advise Restraint | * |
| Oil Services Contractors Advances Revolving | * |
| Optimal Speech Communication Assistance for Residual abilities | * |
| Occupational Skills Competition and Review | * |
| Ohio State Capabilities Assessment for Readiness | * |
| Opportunities Success Careers Attractions and Recreation | * |
| Optimal Summarising Coding and Accurate Records | * |
| Our School Can Achieve Results | * |
| Orbiting Satelite Carry Amateur Radio | * |
| Open System Core Avionics Requirements | * |
| Optical Scanning Apparatus for Ropes | * |
| Optical Switching Systems, Components and Applications Research | * |
| OSHA System for Compliance Assistance and Referral | * |
| Open System for Collaborative Authoring and Reuse | * |
| Original Soundtrack Compositions and Audio Resources | * |
| Omnidirectional Stably Controlled Autonomous Robot | * |