SDL
- Deontic logic
- OpenVMS
- Oracle Corporation
- POV-Ray
- Party of the Democratic Left (2005)
- Party of the Democratic Left (Czech Republic)
- Party of the Democratic Left (Slovakia)
- SDL plc
- Saudi Digital Library
- Scottish Defence League
- Scottsdale Airport
- Sexual division of labour
- Shielded data link connector
- Simple DirectMedia Layer
- Social Democratic League of America
- Software development life cycle
- Soqosoqo Duavata ni Lewenivanua
- Sound Digital
- Space Dynamics Laboratory
- Specification and Description Language
- Sundsvall–Timrå Airport
- Web Services Description Language