sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Spring Independent School District | **** |
| Saginaw Intermediate School District | **** |
| Seguin Independent School District | **** |
| Single Instruction Stream, Single Data Stream | *** |
| Sheldon Independent School District | *** |
| Somerset Independent School District | *** |
| Southside Independent School District | *** |
| Splendora Independent School District | *** |
| Sweeny Independent School District | *** |
| sanilac intermediate school district | *** |
| Sharyland Independent School District | *** |
| Sealy Independent School District | *** |
| Sweetwater Independent School District | *** |
| Somerville Independent School District | *** |
| SHALLOWATER Independent School District | *** |
| Silsbee Independent School District | *** |
| Sunnyvale Independent School District | *** |
| Stamford Independent School District | *** |
| Summit Institute for Sustainable Development | ** |
| Stephenville Independent School District | ** |
| Seeks Input on Superintendent | ** |
| Salado Independent School District | ** |
| Sherman Independent School District | ** |
| Surface Inspection Systems Division | ** |
| Swedish Intelligence and Security Directorate | ** |
| Single Instruction and Single Data | * |
| Society of Illustrators San Diego | * |
| Systems Integration Solutions Division | * |
| Slaton Independent School District | * |
| Smithville Independent School District | * |