RI
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| RI | Refractive Index | - | Computer Acronyms(common) |
| RI | Remedial Investigation | - | Computer Acronyms(common) |
| RI | Replication Index | - | Computer Acronyms(common) |
| RI | Rockwell International | - | Organizations |
| RI | Rhode Island (postal Symbol) | - | Astronomy |
| RI | Research Institute | - | Business and Finance |
| RI | reporting interval | - | Human Genome |