| Office for Students with Disabilities | Academic & Science |
| Optimal Shape Design | Academic & Science |
| Overages, Shortages, and Damages | Accounts and Finance |
| Ostersund | Airport Code |
| Original Schedule Date | Business |
| Office of Supplier Diversity | Business |
| One Shot Deal | Business |
| Original Start Date | Business |
| Outdoor Speaker Depot | Business |
| Oregon School District | Community |
| Ogden School District | Community |
| Open Source Development | Community |
| Organizational Skill Development | Community |
| Othello School District | Community |
| Original Story Debate | Community |
| Order for Snapes Defence | Community |
| Occupational Skill Development | Community |
| Oklahoma School for the Deaf | Community |
| Olympia School District | Community |
| Oxnard School District | Community |
| Oregon School for the Deaf | Community |
| Office of Scholar Development | Community |
| Old Settlers Days | Community |
| Open Source Developers | Community |
| Office of Student Development | Community |
| Oxnard School District's | Community |
| Organization and Staff Development | Community |
| Office of Systems Development | Community |
| Opportunity School District | Community |
| Ohio School for the Deaf | Community |
| Oxford School District | Community |
| On-screen System Display | Computer Hardware |
| Object Storage Device | Computer Hardware |
| On Screen Data | Computer Technology |
| Operating System Development | Computing |
| Optical Storage Device | Computing |
| Open Systems Directive | Computing |
| Open Server Dimension | Computing |
| Object Based Storage Device | Computing |
| Open Source Day | Computing |
| Open Stack Days | Computing |
| Orientation and Script Detection | Computing |
| Outside Source Design | Computing |
| Outsourced Software Development | Computing |
| On-Screen Display | Electronic Device |
| Open Source Device | Electronics |
| Oscillator Strength Distribution | Electronics |
| Over Sampling Depth | Electronics |
| Operational Specification Document | General |
| Oil Spill Detection | General |
| Ocean Sampling Day | General |
| Open Shelter Decker | General |
| Ortho Sanit Diffusion | General |
| On Scren Display | General |
| Ophthalmic Squeeze Dispenser | General |
| Office of Suspension and Debarment | General |
| Optimal Speaker Design | General |
| Otomotiv Sanayicileri Derneginin | General |
| Overall Stopping Distance | General |
| Overtaking Sight Distance | General |
| Overseas Delivery Program | General |
| Optical Surface Dirt | General |
| Overlaid On-screen Display | General |
| Office of Structured Disclosure | General |
| of the Secretary of Defense | General |
| Operational Services | General |
| Object Storage Daemon | General |
| Old School Democrat | Governmental |
| Out of System & Damages | Governmental |
| Operational Services Division | Governmental |
| Office of the Secretary of Defense; Over, Short and Damaged Report | Governmental |
| Obsessive Sneaker Disorder | Internet |
| Osgood-Schlatter Disease | Medical |
| Osteoporose Selbsthilfegruppen Dachverband | Medical |
| Oral Solid Dose | Medical |
| Officer On Special Duty | Military and Defence |
| Office of The Secretary of Defense | Military and Defence |
| Operating Strength Deviation | Military and Defence |
| Operational Sequence Diagram | Military and Defence |
| Ocean Science Discussions | News & Entertainment |
| ?e ?tersund Airport, ?tersund, Sweden | Regional |
| Åre Östersund Airport, Östersund, Sweden | Regional |
| Operational Support Document | Softwares |
| Open Software Distribution | Softwares |
| Operating System Deployment | Softwares |
| Open Software Description | Softwares |
| Open Source Definition | Softwares |
| Åre Östersund Airport | Transport & Travel |
