| Acronym | Definition |
|---|
| SINA➣Sichere Inter-Netzwerk Architektur (German: Secure Inter-Network Architecture; Federal Office for Information Security; Germany) |
| SINA➣Singing Insects of North America |
| SINA➣Sistema Informativo Nazionale Ambientale (Italian: National Environmental Information System; Italy) |
| SINA➣Society for Indecency to Naked Animals (satiric hoax; Alan Abel) |
| SINA➣Static Integrated Network Access |
| SINA➣Schoolsnet Internet Network Administrator |