SDE
- S.D.E.
- SDE Hockey
- SDE Sea Wave
- Screen-door effect
- Sebacoyl dinalbuphine ester
- Self defined ethnicity
- Semantic dictionary encoding
- Senai–Desaru Expressway
- Shadwell railway station
- Social Democratic Party (Estonia)
- Spectral density estimation
- Stochastic differential equation
- Vicecomodoro Ángel de la Paz Aragonés Airport