OS
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| OS | Overlapping Spheres (method) | - | Computer Acronyms(common) |
| OS | Left Eye | - | Medical(slang) |
| OS | On-Orbit Station | - | Organizations |
| OS | Operating Software | - | Organizations |
| OS | Operating System | - | Organizations |
| OS | OPtics Subsystem | - | Organizations |
| OS | Orbiter CEI Specification | - | Organizations |
| OS | Osmium | - | Astronomy |
| OS | Ossetic Language (ISO 639-1 Code) | - | Astronomy |
| OS | Oceanography Section | - | Business and Finance |
| OS | operating system | - | Human Genome |