| Acronym | Definition |
|---|
| SDU➣Syddansk Universitet (Denmark) |
| SDU➣State Disbursement Unit (child support enforcement) |
| SDU➣Service Data Unit |
| SDU➣Session Data Unit |
| SDU➣Social Development Unit |
| SDU➣Staff Development Unit |
| SDU➣Sustainable Development Unit |
| SDU➣Secondary Dwelling Unit (residence) |
| SDU➣Service Delivery Unit |
| SDU➣Satellite Data Unit |
| SDU➣Sodium Deuranate (uranium salt) |
| SDU➣Suleyman Demirel Universitesi (Turkey) |
| SDU➣Special Duties Unit (Hong Kong counter-terrorist group) |
| SDU➣Special Duty Unit |
| SDU➣Rio De Janeiro, Rio De Janeiro, Brazil - Santos Dumont (Airport Code) |
| SDU➣Software Development Unit |
| SDU➣Scrapbook Design University (est. 1996) |
| SDU➣Staatsdrukkerij/Uitgeverij |
| SDU➣Subsea Distribution Unit (oil industry) |
| SDU➣Secure Data Unit |
| SDU➣Students for a Democratic University (Canada) |
| SDU➣Standard Dial-Up |
| SDU➣Signal Distribution Unit |
| SDU➣Selection/Distribution Unit |
| SDU➣Seat Display Unit (video monitor control of airline passenger seat) |
| SDU➣Saint Dunstan's University (former college, Charlottetown, PEI, Canada) |
| SDU➣Sophos Diagnostic Utility |
| SDU➣Seat Disconnect Unit |
| SDU➣Safety Disarm Unit (military aviation) |
| SDU➣Subscriber Data Unit |
| SDU➣Shipborne Disk Unit |
| SDU➣Signal Detection Unit |
| SDU➣Security Device Unit |
| SDU➣Self Defense Upgrade |
| SDU➣Standalone Display Unit |
| SDU➣Structural Damage Underwriter (insurance) |
| SDU➣Switch Driver Unit |
| SDU➣Storage Device Unit |
| SDU➣Super-high Display Unit |