SIR
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| SIR | Shuttle Imaging Radar | - | Atmospheric Research Center |
| SIR | Selected Ion Recording | - | Computer Acronyms(common) |
| SIR | Statutory Invention Registration | - | Computer Acronyms(common) |
| SIR | Shuttle Imaging Radar | - | Organizations |
| SIR | Software Initiated Restart | - | Organizations |
| SIR | System Interface Requirements | - | Organizations |
| SIR | Systems Integration Review | - | Organizations |
| SIR | Shuttle Imaging Radar | - | Business and Finance |
| SIR | Spaceborne Imaging Radar | - | Business and Finance |