| SEDC | Saginaw Economic Development Corporation 
| Others |
| SEDC | Saratoga Economic Development Corporation
| Others |
| SEDC | Sarawak Economic Development Corporation
| Others |
| SEDC | Search for Explanations for Document Classification
| Others |
| SEDC | Secure Edge Data Center
| Others |
| SEDC | Seguin Economic Development Corporation
| Others |
| SEDC | Shallow Exploration Drillers Clinic
| Others |
| SEDC | Shawnee Economic Development Council
| Others |
| SEDC | Shelton Economic Development Corporation
| Others |
| SEDC | Siouxland Economic Development
| Others |
| SEDC | Siouxland Economic Development Corporation
| Others |
| SEDC | Smart Energy Demand Coalition
| Others |
| SEDC | Solar Energy Development Center
| Others |
| SEDC | South East Development Centre
| Others |
| SEDC | Southeastern Economic Development Commission
| Others |
| SEDC | Southeastern Economic Development Corporation
| Others |
| SEDC | Southern Economic Development Council
| Others |
| SEDC | Southwest Educational Development Center
| Others |
| SEDC | Southwestern Educational Developmental Consortium
| Others |
| SEDC | Spearfish Economic Development
| Others |
| SEDC | Spearfish Economic Development Corporation
| Others |
| SEDC | State Economic Development Corporation
| Others |
| SEDC | Strafford Economic Development Corporation
| Others |
| SEDC | Student Entrepreneur Development Center
| Others |
| SEDC | Supplementary Excitation Damping Control
| Others |
| SEDC | Surabaya English Debate Championship
| Others |
| SEDC | System Environment Data Collections
| Others |