| DECM | Data Evaluation for Climate Models 
| Others |
| DECM | Database Enforced Change Management
| Others |
| DECM | Decided Excellence Catholic Media
| Others |
| DECM | Defensive Electronic Countermeasures
| Others |
| DECM | Design for Environmentally Conscious Manufacturing
| Others |
| DECM | Diabetes and Endocrine Center of Mississippi
| Others |
| DECM | Diabetes Education Center of the Midlands
| Others |
| DECM | Digital Equipment Communication Maintenance (UK)
| Others |
| DECM | Digital Evidence Case Management
| Others |
| DECM | District Executive Committee Meeting
| Others |
| DECM | District Executive Council Meeting
| Others |