| Acronym | Definition |
|---|
| DEMS | Department of Extra Mural Studies (various locations) |
| DEMS | Digital Electronic Message Service |
| DEMS | Department of Earth and Marine Sciences (Australia) |
| DEMS | Duke Ellington Music Society |
| DEMS | Dépannage Électroménager Services (French: Electronics Troubleshooting Services) |
| DEMS | Differential Electrochemical Mass Spectrometry |
| DEMS | Defensively Equipped Merchant Ship |
| DEMS | Digital Electronic Messaging Service |
| DEMS | Deployment Management System |
| DEMS | Data Entry Management System |
| DEMS | Diplôme d'Etat de Musique Supérieur (French: Music Advanced State Diploma) |