SU
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| SU | Standard Unit | - | Computer Acronyms(common) |
| SU | Support Unit | - | Organizations |
| SU | Shut Up | - | Sms Text Smileys and Emoticons |
| SU | Shut Up | - | ISO Country Codes |
| SU | Soviet Union (ISO 3166 Digram; Obsolete 1992) - Sudan (FIPS 10-4 Country Code) | - | Astronomy |
| SU | Sundanese Language (ISO 639-1 Code) | - | Astronomy |