| Acronym | Definition |
|---|
| SSD | Satellite Services Division (NOAA) |
| SSD | Saturated Surface Dry (construction materials) |
| SSD | Svensk Samhällsvetenskaplig Datatjänst (Sweden) |
| SSD | Super Star Destroyer (Star Wars) |
| SSD | Stiftung Studenten Discount (German) |
| SSD | Settori Scientifico-Disciplinari (Italian) |
| SSD | Sum of Squared Differences |
| SSD | Sterile Services Department (UK) |
| SSD | Stopping Sight Distance |
| SSD | Seattle School District |
| SSD | Susquehanna Service Dogs |
| SSD | Sudden Sniffing Death |
| SSD | Systems Software Development |
| SSD | Swedish Social Science Data Service |
| SSD | Symposium on Large Spatial Databases |
| SSD | Stahlschiebedach |
| SSD | Single Seed Descent |
| SSD | Silicon Strip Detector |
| SSD | Society System Decontrol (band) |
| SSD | System Sequence Diagram |
| SSD | species-sensitivity distribution (ecologic risk assessment) |
| SSD | Staatssicherheitsdienst (East German Secret Service; Popular name: STASI) |
| SSD | State Security Department (various nations) |
| SSD | Singapore School for the Deaf |
| SSD | Systems, Signals and Devices (International Conference) |
| SSD | Static Separation of Duty |
| SSD | So So Def (record label) |
| SSD | Sitka School District (Alaska) |
| SSD | Supercomputer Software Department |
| SSD | Special Security Division (Maquis Forces International) |
| SSD | Support Staff Division |
| SSD | Sociétés, Santé, Développement (French) |
| SSD | Schuldscheindarlehen (German promissory note) |
| SSD | SMPTE Slave Driver (digital sync device) |
| SSD | Source Surface Distance |
| SSD | Simple Storefront Distribution |
| SSD | Sentinel System Driver |
| SSD | State Science Day (Ohio) |
| SSD | Scientific Software Development |
| SSD | Science for Sustainable Development |
| SSD | Supervising Scientist Division (Australia) |
| SSD | Structure Superposition Database |
| SSD | System Support Division |
| SSD | Sunnyside School District (Washington) |
| SSD | Sprechen Sie Deutsch? (German: Do you speak German?) |
| SSD | Seaford School District (Delaware) |
| SSD | Super Speed Draft (printing) |
| SSD | Santee School District (California) |
| SSD | Severe Sustained Drought |
| SSD | Sustainable Skills Development |
| SSD | System Specification Description |
| SSD | Self-Sagging Device |
| SSD | Stainless Steel Droppings |
| SSD | Secondary Switching Device |
| SSD | Standards Support Document |
| SSD | Shinyaku Seiken Densetsu (game) |
| SSD | Surveillance Systems Division |
| SSD | Soulshot D Grade (Lineage 2 game) |
| SSD | Super Sudden Death (gaming) |
| SSD | Static Sensitive Device |
| SSD | Scheduled Shipping Date |
| SSD | Software Services of Delaware, Inc |
| SSD | Student Support Document |
| SSD | Student Systems Development |
| SSD | Space Sciences Directorate (NASA) |
| SSD | Signal Space Detector |
| SSD | Simultaneous Signal Detection |
| SSD | Shore Side Detachment |
| SSD | Safety Standards Division |
| SSD | Solid State Decoupler (electrical protection) |
| SSD | Serial Service Directory |
| SSD | Sourcing and Supplier Development (various companies) |
| SSD | Space Station Division |
| SSD | Safety, Security & Dismantlement |
| SSD | Software Support Date |
| SSD | Satellite Systems Division |
| SSD | Strategic Sourcing Director |
| SSD | Spacecraft Software Division (US NASA) |
| SSD | Sun-Synchronous Day/Night |
| SSD | Survival Support Device |
| SSD | Strategic Sales Director |
| SSD | Second Start Dial |
| SSD | Software Solutions and Designs, Inc |
| SSD | Systematic Sales Dialogue |
| SSD | Structured File Server Definitions |
| SSD | Specialized Support Depot |
| SSD | Software Structural Description |
| SSD | SHARE Secretary's Distribution |
| SSD | Safety Scoping Document |
| SSD | Squadron Support Division |
| SSD | Strathclyde Standard Desktop |
| SSD | Space Systems Directorate |
| SSD | Sub-Optimum Sequence Detection |
| SSD | Strength Screening Device |
| SSD | Sugar-Sweetened Soft Drink |
| SSD | Server Side Daemon |
| SSD | Second-degree Stochastical Dominance |
| SSD | Sheet Steel Decking |
| SSD | SHINPADS Standard Display |
| SSD | Squires Sanders and Dempsey LLP (law firm) |
| SSD | Software Systems Database |
| SSD | Service de Sûreté des Déchets Radioactifs (French: Department of Safety of Radioactive Waste) |
| SSD | Single Song Download |
| SSD | Solid State Disk |
| SSD | Space Settlement Design |
| SSD | Social Security Disability |
| SSD | Ship Self Defense |
| SSD | Sisters School District (Oregon) |
| SSD | Signed, Sealed, Delivered |
| SSD | Silver Sulfadiazine |
| SSD | Secondary Storage Device (computer storage) |
| SSD | Shelter Static Dehumidifier |
| SSD | Space Systems Division |
| SSD | Shared Secret Data |
| SSD | Solar System Dynamics (NASA group) |
| SSD | Secure System Design |
| SSD | Sveriges Statistiska Databaser (Swedish: Sweden's Statistical Databases) |
| SSD | Social Sciences Division |
| SSD | Simpson Manufacturing Company (stock symbol) |
| SSD | Solid State Drive |
| SSD | Spatial Databases |
| SSD | Sectoral Social Dialogue |
| SSD | Shoreline School District |
| SSD | Seven Segment Display |
| SSD | Special School District |
| SSD | Services for Students with Disabilities |
| SSD | Social Services Department |
| SSD | Specialized Search Dog |
| SSD | Security Support Division |
| SSD | Security Switching Device |
| SSD | Specialized Services Division (Honolulu Police Department SWAT Team) |
| SSD | Solid State Storage Device |
| SSD | Source Selection Decision |
| SSD | Small Screen Display |
| SSD | Solution Specification Document (software) |