| Acronym | Definition |
|---|
| SED➣Special Education |
| SED➣Stream Editor |
| SED➣State Education Department |
| SED➣Sedalia (Amtrak station code; Sedalia, MO) |
| SED➣Shipper's Export Declaration |
| SED➣Systems Engineering and Development (US DHS) |
| SED➣Social and Emotional Development (education) |
| SED➣Spondyloepiphyseal Dysplasia (bone growth disorder) |
| SED➣Serious Emotional Disturbance |
| SED➣South Eastern Division (UK) |
| SED➣School of English and Drama (UK) |
| SED➣Sound Editor Deluxe (software) |
| SED➣Sociedad Española del Dolor (Spanish: Spanish Society of Pain) |
| SED➣Surface-Conduction Electron-Emitter Display |
| SED➣Senior Executive Director (various organizations) |
| SED➣Sozialistische Einheitspartei Deutschlands (Socialist Union Party of East Germany) |
| SED➣Sony Energy Devices (Japan) |
| SED➣Structured Electronic Document (data transmission) |
| SED➣Surface Conduction Electron Emitter Display |
| SED➣Self Extracting Directive |
| SED➣Strategic Economic Dialogue |
| SED➣Sciences and Exploration Directorate (US NASA) |
| SED➣Severely Emotionally Disturbed |
| SED➣Socio-Economic Development |
| SED➣Spectral Energy Distribution |
| SED➣Self-Encrypting Drive |
| SED➣Survey of Earned Doctorates |
| SED➣Sedating |
| SED➣Small Electronic Device |
| SED➣Seeing-Eye Dog |
| SED➣Small Enterprise Development |
| SED➣Safety Engineered Device (healthcare) |
| SED➣School Education Director (Australia) |
| SED➣Software Engineering Directorate |
| SED➣Survey of English Dialects |
| SED➣Supported Education |
| SED➣Scottish Enterprise Dunbartonshire (UK) |
| SED➣Systems Engineering Division |
| SED➣Sustainable Energy Development |
| SED➣Schweizerischer Erdbebendienst (Swiss Seismological Service) |
| SED➣Standard Error of the Difference (statistics) |
| SED➣Signals External Data (US DoD) |
| SED➣Self Employment Development (various organizations) |
| SED➣Selective Eating Disorder (psychology) |
| SED➣Software Error Density (ratio) |
| SED➣Special Enforcement Detail |
| SED➣Strain Energy Density |
| SED➣Science Education Department |
| SED➣Smoke-Emitting Diode |
| SED➣Site Equipment Demonstration (exhibition) |
| SED➣School of Environmental Design |
| SED➣Software Engineering Design |
| SED➣Solar Energy Division (American Society of Mechanical Engineers) |
| SED➣Squared Euclidean Distance |
| SED➣Science, Environment and Development |
| SED➣Skill Enhancement Division |
| SED➣Statistical Engineering Division |
| SED➣Spanish Education Development |
| SED➣Secondary Electron Detector |
| SED➣Shore Establishments Division (US Navy) |
| SED➣Severe Emotional Disability |
| SED➣Service d'Enseignement à Distance (French: Services for Distance Learning) |
| SED➣Sweet Eagle Dreams |
| SED➣Single-Event Disturb |
| SED➣Skin Erythema Dose |
| SED➣Single Error Detection |
| SED➣Satellite Eligibility Determination (site) |
| SED➣Special Events Director |
| SED➣Suberythemal Dose |
| SED➣Sub-clinical Eating Disorder |
| SED➣Severely Employment Disadvantaged |
| SED➣Sensor Evolutionary Development (aeronautics) |
| SED➣Spacecraft Engineering Department |
| SED➣Société Etudes Développements (French engineering company) |
| SED➣Senior Executive Development |
| SED➣Sub-Entire Domain |
| SED➣Service d'Expérimentation et de Développement (French: Experimentation and Development Office; National Institute for Research in Computer Science and Control) |
| SED➣Special Electrical Devices |
| SED➣Special Engineers Detachment (Manhattan Project) |
| SED➣Sub-Epithelial Domain (biology) |
| SED➣Short Edge Distance |
| SED➣Sales, Engineering and Development |
| SED➣Strip Endpoint Diffraction |
| SED➣System Evolution Description |
| SED➣Sedom, Israel - Domestic Airfield (airport code) |
| SED➣State Emergency Duty (Missouri) |
| SED➣Service des Etablissements de Détention (French: Office of Detention Facilities; Switzerland) |
| SED➣Space Exploration Day |
| SED➣Soulever et Déplacer (French: Lift and Move; moving company) |
| SED➣Standard Erytemdos |