CETIS
| Acronym | Definition |
|---|---|
| CETIS | Centre for Educational Technology Interoperability Standards (European Commission) |
| CETIS | Centro de Estudios Tecnologicos Industriales y de Servicio (Spanish: Center for Technology Studies and Service Industry; Mexico) |
| CETIS | Comprehensive Environmental Toxicity Information System |
| CETIS | Complex Effluent Toxicity Information System |