| SAIS | Saudi Arabian International School 
| Others |
| SAIS | Schindler Acceptance Inspection Standards
| Others |
| SAIS | School of Advanced International Studies
| Others |
| SAIS | Secretary of the Army, Information Systems
| Others |
| SAIS | Seoul Academy International School
| Others |
| SAIS | Services Accountability Improvement System
| Others |
| SAIS | Southern Africa Innovation Support
| Others |
| SAIS | Southern Association for Information Systems
| Others |
| SAIS | Southern Association of Independent Schools
| Others |
| SAIS | Strange Adventures in Infinite Space
| Others |
| SAIS | Student Academic Information System
| Others |
| SAIS | Student Accommodation and Information Services
| Others |
| SAIS | Student Accountability Information System
| Others |
| SAIS | Student Assessment of Instruction System
| Others |
| SAIS | Subacromial Impingement Syndrome
| Others |
| SAIS | Suffix Array Induced Sorting
| Others |
| SAIS | Superior Access Insurance Services
| Others |
| SAIS | Supernatural Acquisitions and Investigations Squad
| Others |
| SAIS | Swedish Artificial Intelligence Society
| Others |
| SAIS | The Southern Association For Independent Schools
| Others |