NOS
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| NOS | Nitric Oxide Synthase | - | Computer Acronyms(common) |
| NOS | Not Otherwise Specified | - | Computer Acronyms(common) |
| NOS | Network Operating System | - | Human Genome |
| NOS | Not Otherwise Specified | - | Medical(slang) |
| NOS | New Old Stock | - | ISO Country Codes |
| NOS | Network Operating System - New Old Stock (Internet Auction/trading Listings) - Nitric Oxide Synthase (enzyme) | - | Astronomy |
| NOS | National Ocean Service | - | Business and Finance |