| Acronym | Definition |
|---|
| DIEM | Department of Industrial Engineering and Management (Finland) |
| DIEM | Danish Institute of Electroacoustic Music |
| DIEM | Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (Italian: Mechanical Engineering Department) |
| DIEM | Droit et Immigration Europe-Maghreb (French: Immigration Law and Europe-Maghreb) |
| DIEM | Dansk Institut for Elektronisk Musik (Danish: Danish Institute of Electronic Music; est. 1987; Denmark) |
| DIEM | Testing a Diffusion of Innovations in Education Model (Mark K. Warford book) |
| DIEM | Diploma in International Event Management (academic program) |