| Student Direct Stream | Academic & Science |
| South Dakota State | Academic & Science |
| Social and Decision Sciences | Academic & Science |
| Sustainability and Data Sciences | Academic & Science |
| Society for Disability Studies | Academic & Science |
| Society for Disability | Academic & Science |
| Student Disability Services | Academic & Science |
| Saudi Dental Society | Academic & Science |
| الجمعية السعودية لطب الأسنان | Academic & Science |
| Sado Shima | Airport Code |
| Start Doubling Sales | Business |
| Staff Development Scheme | Business |
| Supervisory Development Series | Business |
| Special Direct System | Business |
| Sacandaga Dog Supply | Business |
| Slotted Drive System | Business |
| Surf, Dive, 'n' Ski | Business |
| Stang Decision Systems | Business |
| Sungard Data Systems, Inc. | Business |
| Srpska Demokratska Stranka | Business |
| Superior Detection Systems | Business |
| Schedule Diary System | Business |
| Same Day Service | Business |
| Sterker Door Strijd | Business |
| Sodium Dodecyl Sulfate | Chemistry |
| Sodium Dodecyl Sulphate | Chemistry |
| Scientific Data Set | Chemistry |
| Sustainable Development Scenario | Community |
| School of Design Strategies | Community |
| School Data Sync | Community |
| Sub-Division Surfaces | Community |
| Stop Drop 'n Skank | Community |
| Seventh Day Slumber | Community |
| Skills Development Scotland | Community |
| Sublingual Delivery System | Community |
| Second Development Services | Community |
| Seven Deadly Sins | Community |
| Sample Dump Standard | Computer Assembly Language |
| Schema Definition Set | Computing |
| Software Diversified Services | Computing |
| Steganographic Detection System | Computing |
| Sub Division Surface | Computing |
| Simultaneous Double Sided | Computing |
| Stockwatch Data Service | Computing |
| Short Data Service | Computing |
| Science Data Set | Computing |
| Storage Domain Server | Computing |
| Scientific Data Systems | Computing |
| Shared Data Set | Computing |
| Sun Directory Services | Computing |
| System Data Set | Computing |
| Switched Data Service | Computing |
| Standardized Data Set | Computing |
| Sysops Distribution System | Computing |
| Synchronous Data Set | Computing |
| Self Defining Data System | Computing |
| Serial Data Stream | Computing |
| Secure Data Services | Computing |
| Specific Data Systems | Computing |
| Switched Digital Service | Computing |
| Simple Data Service | Computing |
| Spatial Data Services | Computing |
| Satellite Data Service | Computing |
| Shared Data Services | Computing |
| Secure Document Service | Computing |
| Space Data Systems | Computing |
| Star Dot Star | Computing |
| Software Defined Storage | Computing |
| Smart Data and Smarter Descriptions | Computing |
| Synchronous Data Strobe | Computing |
| Safety Data Sheets | Computing |
| Software Defined Security | Computing |
| Self Defining Structure | Computing |
| Software Deployment System | Computing |
| Social Data Science | Computing |
| Alchemint Standards | Cryptocurrency |
| Self Directed Search | Educational Degree |
| Smart Distributed System | Electronics |
| Midi Sample Dump Standard File | File Type |
| Sustainable Drainage Systems | General |
| Smart Deployment Series | General |
| System Description Section | General |
| Statoil Detaljhandel Skandinavia | General |
| Super Dupe Snooper | General |
| Secret Discovery Service | General |
| Simple Denial Strategy | General |
| Sodium Dodecyl Scripts | General |
| Schnell Drilling System | General |
| Stand Dun Stand | General |
| Strategic Defense System | General |
| Strategic Data Systems | General |
| Scan Data Set | General |
| Self Direction Search | General |
| Slow Digesting Starches | General |
| Ship Display Sheet | General |
| Slotted Drive Shaft | General |
| Shooter Detection Systems | General |
| Secure Data Sheet | General |
| Special Drive System | General |
| Service Delivery Strategy | General |
| Strategic Design Scenarios | General |
| Shock Damping System | General |
| Star Diagnosis System | General |
| Sport Direct Shift | General |
| Saab Drive Sense | General |
| Sport Dynamic Suspension | General |
| Scania Driver Support | General |
| Sport Driving School | General |
| Super Drift Series | General |
| Simple Digital System | General |
| Super Dirtcar Series | General |
| Standard Deviation of Speed | General |
| Smart Driving Series | General |
| Smart Driving Simulation | General |
| Silver Dollar Speedway | General |
| Software Delivery System | General |
| Sprach Dialog System | General |
| Svenska Delorean Sallskapet | General |
| System Diagnosis | General |
| Service Data and Specifications | General |
| Self Driving System | General |
| Supplier Direct Ship | General |
| Suncoast Data Services | General |
| Slovenska demokratska stranka | General |
| Saturday Down South | General |
| Somebody Do Something | General |
| Safety Determination Specifications | General |
| Simple Dynamic Strings | General |
| Safety Data Standards | General |
| stand for Definition of SDS | General |
| Specialty Data Systems | General |
| Snowboard Design Syndicate | General |
| Smart Data Strategies | General |
| Safe Directives and Standards | General |
| Storage and Data Sheet | General |
| Samsung Data Systems | General |
| Spectrum Data Services | General |
| Scratch Design Studio | General |
| Secure Disposal and Storage | General |
| System Downtime Standard | General |
| Scientific Data System | General |
| Satellite Data System | General |
| Smoke Detection System | General |
| Service Delivery Strategies | General |
| Sweet Dreams Sexi | General |
| Staff Development Services | Governmental |
| Submission Data Standards | Governmental |
| Students for a Democratic Society | Governmental |
| State Disposal System | Governmental |
| SADULSHAHR | Indian Railway Station |
| Spam Detection System | Internet |
| Standard Deviation Score | Maths |
| Same Day Surgical | Medical |
| Same Day Surgery | Medical |
| Schedule for Deficit Syndrome | Medical |
| School Dental Services | Medical |
| self-rated depression scale | Medical |
| Sensory Deprivation Syndrome | Medical |
| Sheehan Disability Scale | Medical |
| Shy-Drager syndrome | Medical |
| Social Desirability Scale | Medical |
| Sodium Dodecyl Sulphonate | Medical |
| Specific Diagnostic Service | Medical |
| Spine Directory Service | Medical |
| Symptom Distress Scale | Medical |
| Sudden Death Syndrome | Medical |
| Safety Data Sheet | Messaging |
| Strategic Defense Systems | Military and Defence |
| Standard Depot System | Military and Defence |
| Solution Development System | Military and Defence |
| Simple Digital Systems | Softwares |
| Sequence Detection System | Softwares |
| Software Design Specification | Softwares |
| Sensor Display System | Space Science |
| Shuttle Dynamic Simulator | Space Science |
| Steering Damping System | Space Science |
| System Design Specification | Space Science |
| Sit Down Start | Sports |
