| Full Form Of OS In computer | operating system |
| Full Form Of OS In obstetrics | external os |
| Full Form Of OS In pregnancy | The opening in the center of the cervix |
| Full Form Of OS In chemistry | osmium |
| Full Form Of OS In medical | oculus sinister |
| Full Form Of OS In uterus | external os |
| Full Form Of OS In office | Out of Stock
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| Full Form Of OS In chat | Operating System |
| Full Form Of OS In Indian Railways | Out Station |
| Full Form Of OS In Information Technology | Operating System |
| 2nd Full Form Of OS In Information Technology | Open Source |
| Full Form Of OS In Computer and Networking | Optical fiber Singlemode category |
| Full Form Of OS In Telecommunication | Operations System |
| Full Form Of OS In Real Estate | Off-street Parking |
| Full Form Of OS In Accounts and Finance | On Sheet |
| Full Form Of OS In Networking | Online Services |
| 2nd Full Form Of OS In Networking | Overhead Sending |
| 3rd Full Form Of OS In Networking | Open Server |
| Full Form Of OS In Space Science | Operating Software |
| 2nd Full Form Of OS In Space Science | Outer Space |
| Full Form Of OS In Softwares | Open Sockets |
| 2nd Full Form Of OS In Softwares | Optimize for Size |
| Full Form Of OS In Job Title | Out Sized |
| 2nd Full Form Of OS In Job Title | Ordinary Seaman |
| 3rd Full Form Of OS In Job Title | Other Singer |
| Full Form Of OS In Military and Defence | Ordnance Survey |
| 2nd Full Form Of OS In Military and Defence | On Station |
| 3rd Full Form Of OS In Military and Defence | Opportunity To Serve |
| Full Form Of OS In Stock Exchange | Open Street |
| Full Form Of OS In Sports | Optimal Strategy |
| 2nd Full Form Of OS In Sports | Outside Shot |