SDE can stand for:

In science, medicine, and technology

• Screen door effect, a video display issue
• Sebacoyl dinalbuphine ester, an analgesic
• Semantic dictionary encoding
• Software development engineer
• Software development environment
• Spatial Database Engine ( ArcSDE)
• Spectral density estimation
• Stochastic differential equation
• sub-divisional error, a read head error mechanism
• System development environment

In politics

• Social Democratic Party (Estonia)
• State delegate equivalents, a part of the Iowa caucuses § Democratic Party

In transportation

• The IATA code for an airport in Argentina, Vicecomodoro Ángel de la Paz Aragonés Airport
• The National Rail station code for a railway station in London, England, Shadwell railway station
• An expressway in Johor, Malaysia, Senai–Desaru Expressway

Other uses

• S.D.E., a 2000 album by Cam'ron
• Self Defined Ethnicity, an ethnic classification code used by the British government and police
• Self-directed education, self-learning, often synonymous with unschooling
• Strong-side defensive end, a position in American football

This disambiguation page lists articles associated with the title SDE.
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