| Acronym | Definition |
|---|
| CDU | Christlich Demokratische Union Deutschlands (German: Christian Democratic Union; Germany) |
| CDU | Control Display Unit |
| CDU | Clasificación Decimal Universal (Spanish) |
| CDU | Control & Display Unit |
| CDU | Control and Display Unit |
| CDU | Crude Distillation Unit (refinery) |
| CDU | Coligação Democrática Unitária (United Democratic Coalition, Portugal) |
| CDU | Clinical Decision Unit (UK hospitals) |
| CDU | Census Dissemination Unit (UK 2001 Census) |
| CDU | Charles Drew University of Medicine and Science (Los Angeles, CA) |
| CDU | Computer Display Unit |
| CDU | Cooling Distribution Unit |
| CDU | Cockpit Display Unit |
| CDU | Central Display Unit |
| CDU | Command Detector Unit |
| CDU | Cebu Doctors' University |
| CDU | Civil Disturbance Unit |
| CDU | Cabinet Distribution Unit |
| CDU | Chest Drainage Unit |
| CDU | Campaign for Democracy in Ulster |
| CDU | Cardiac Diagnostic Unit |
| CDU | Coupling Data Unit |
| CDU | Command Decoder Unit |
| CDU | Combiner Distribution Unit |
| CDU | Consultancy and Development Unit |
| CDU | Combining and Distribution Unit (3G radio systems) |
| CDU | Commander's Display Unit |
| CDU | Courtesy Double Up (poker) |
| CDU | Control Distribution Unit |
| CDU | Command Data Unit |
| CDU | Care Delivery Unit |
| CDU | Coupling Display Unit (NASA) |
| CDU | counterdrug update (US DoD) |
| CDU | CRT Display Unit (NASA) |
| CDU | Customer Data Unit |
| CDU | Chaff Dispenser Unit (military aviation) |
| CDU | Christelijk-Demokratische Unie (Dutch: Christian Democratic Union) |
| CDU | Command Destruct Unit |
| CDU | Communications Distribution Unit (FDDM) |
| CDU | Country Development Unit |
| CDU | Compatibility Display Interface |
| CDU | Command Demodulator Unit |
| CDU | Capacitive/Capacitor Discharge Unit |
| CDU | Common Drive Unit |
| CDU | Criminal Detective Unit |
| CDU | Component Development Unit |
| CDU | Collateral Data Update |
| CDU | Consolidated Diving Unit |
| CDU | Common Display Upgrade |
| CDU | Cyanide Detoxification Unit |
| CDU | Corrugated Display Unit |
| CDU | Cristiana Democratica Unione (Christian Democratic Union; Italian political party) |
| CDU | Carrier Distribution Unit |
| CDU | Continuing Disclosure Undertaking (municipal securites agrement) |