| SA/SD | Structured Analysis / Structured Design
| Others |
| SASD | Sacramento Area Sewer District
| Others |
| SASD | Saving Amarillo Shelter Dogs
| Others |
| SASD | School Administrators of South Dakota
| Others |
| SASD | Secret and Ancient Society of Dragonologists
| Others |
| SASD | Sequential Access Storage Device
| Others |
| SASD | Session Announcement Service Daemon
| Others |
| SASD | Shaler Area School District
| Others |
| SASD | Sheboygan Area School District
| Others |
| SASD | Shintaro Akatsu School of Design
| Others |
| SASD | Shippensburg Area School District
| Others |
| SASD | Sialic Acid Storage Disorders
| Others |
| SASD | Sibes And Sled Dogs
| Others |
| SASD | Somerset Area School District
| Others |
| SASD | Souderton Area School District
| Others |
| SASD | Spend a Summer Day
| Others |
| SASD | State Ambulatory Surgery Databases
| Others |
| SASD | Stoughton Area School District
| Others |
| SASD | Stroudsburg Area School District
| Others |
| SASD | Structure Analysis and Structured Design
| Others |
| SASD | Sullivan Alliance for Sustainable Development
| Others |
| SASD | Surgery and Services Databases
| Others |