TOS
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| TOS | Transfer Orbit Stage | - | Atmospheric Research Center |
| TOS | Test Operating System | - | Organizations |
| TOS | TIROS Operational Satellite | - | Scuba Diving |
| TOS | Tape Operating System - Terms Of Service - Tramiel Operating System | - | Astronomy |
| TOS | Tiros Operational Satellite | - | Business and Finance |