| Acronym | Definition |
|---|
| ECID | Execution Context Identifier (Oracle) |
| ECID | Exclusive Chip Identification (Apple product serial number) |
| ECID | Embracing Complexity in Design (research project; UK) |
| ECID | Economic Crime Investigation Department (various locations) |
| ECID | Européenne de Conception, d'Ingénierie et de Distribution (French: European Design, Engineering and Distribution) |
| ECID | Economic Crime Investigation Division (various organizations) |
| ECID | Educational Computing and Instructional Development (various universities) |
| ECID | Equine Combined Immunodeficiency |