| Acronym | Definition |
|---|
| SDL | SAW (Surface Acoustic Wave) Delay Line |
| SDL | Security Development Lifecycle |
| SDL | Sturm der Liebe (German: Storm of Love) |
| SDL | Simple DirectMedia Layer |
| SDL | Skills Development Levy (tax; South Africa) |
| SDL | Studio Daniel Libeskind (architecture firm; various locations) |
| SDL | School of Distance Learning (various organizations) |
| SDL | Self Directed Learning |
| SDL | Scheduling Description Language |
| SDL | Simple Data Link |
| SDL | Solution Deliverables List |
| SDL | Shielded Data Link |
| SDL | Specification and Description Language |
| SDL | System Directory List |
| SDL | Service Definition Language |
| SDL | Simple Directmedia Library |
| SDL | Sound Library |
| SDL | Slidell (Amtrak station code; Slidell, LA) |
| SDL | Specification and Description Language (CCITT) |
| SDL | Software Development Lifecycle |
| SDL | Space Dynamics Laboratory |
| SDL | Sustainable Development Law |
| SDL | Schematic Driven Layout |
| SDL | Service Description Language |
| SDL | School District Leadership (New York) |
| SDL | Software Development Library |
| SDL | System Description Language |
| SDL | Structural Dynamics Laboratory (US NASA) |
| SDL | Statewide Database Licensing (Washington State Library) |
| SDL | Systems Development Laboratory (JPL) |
| SDL | Specification and Design Language |
| SDL | System Design Language |
| SDL | Sogosogo Duavata Ni Lewenivanua (United Fiji Party, Fiji) |
| SDL | Service Delivery Lead |
| SDL | Storage Definition Language |
| SDL | Statistical Disclosure Limitation |
| SDL | System Design Laboratory |
| SDL | School Download Library (OverDrive, Inc.) |
| SDL | Software Development Laboratory |
| SDL | Superimposed Dead Load |
| SDL | Serial Data Link |
| SDL | Sundsvall, Sweden - Sundsvall (Airport Code) |
| SDL | Search Digital Libraries |
| SDL | Secure Domain Logon |
| SDL | Structure Description Language |
| SDL | Strana Demokratické Levice (Czech Republic) |
| SDL | Supported Distance Learning (various locations) |
| SDL | Symbian Developer Library (computing) |
| SDL | Signaling Data Link |
| SDL | Sociolinguistique et Dynamique des Langues (French: Sociolinguistics and Dynamic Languages) |
| SDL | Standard Distribution List |
| SDL | Satellite Data Link |
| SDL | Soft Defect Localization (scanning laser microscopy methodology) |
| SDL | Software Development Lohninger |
| SDL | Surface Data Logging |
| SDL | State Designated Level |
| SDL | Sample Detection Limit |
| SDL | Structured Design Language |
| SDL | Scouts du Liban (Lebanon) |
| SDL | Stammdienststelle der Luftwaffe (German) |
| SDL | Sensor Data Link |
| SDL | Synchronous Delay Line |
| SDL | Switched Delay Line (fiber optics) |
| SDL | Supplementary Defect List |
| SDL | Screen Definition Language |
| SDL | Shared Distribution List |
| SDL | Solution Demonstration Laboratory |
| SDL | Space Disturbances Laboratory |
| SDL | Scottsdale, Arizona - Municipal (airport code) |
| SDL | Smart Data Loopback (Hekimian) |
| SDL | Supplier Document List |
| SDL | Subcontractor Data List |
| SDL | Standard Direct Layer (low level computer graphics) |