| 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 |
| SAISA | South Asia Inter School Association
| Others |
| SAISA | South Asian Inter Scholastic Association
| Others |
| SAISA | South Atlantic Interscholastic Sailing Association
| Others |
| SAISA | South Australian Ice Skating Association
| Others |
| SAISD | San Angelo Independent School District
| Others |
| SAISD | San Antonio Independent School District
| Others |
| SAISD | San Augustine Independent School District
| Others |
| SAISD | Substance and Alcohol Intervention Services for the Deaf
| Others |
| SAISE | South Asia Institute of Science and Engineering
| Others |
| SAISS | South African Institute Of Security Studies
| Others |
| SAISS | Student Academic Impact Summary Statement
| Others |
| SAISS | Subcommittee on Automated Information Systems Security of NTISSC
| Others |
| SAIT | Samsung Advanced Institute Of Technology
| Others |
| SAIT | School Assistance and Intervention Team
| Others |
| SAIT | School of Applied Information Technology
| Others |
| SAIT | Serious Accident Investigation Team
| Others |
| SAIT | Society For Auditory Intervention Techniques
| Others |
| SAIT | South Alberta Institute of Technology
| Others |
| SAIT | Southern Alberta Institute of Technology
| Others |
| SAIT | Southern Alberta Institute of Technology (prior to 1960 PITA)
| Others |
| SAIT | Student Affairs Information Technologies
| Others |
| SAIT | Student Assistance Intervention Team
| Others |
| SAIT | Super Advanced Intelligent Tape
| Others |
| SAITALEK | Suid-Afrikaanse Instituut vir TAal, Lettere En Kuns
| Others |
| SAITE | Southern Arizona Institute of Transporation Engineers
| Others |
| SAITE | Southern Arizona Institute of Transportation Engineers
| Others |
| SAITE | Stakeholders and Information Technology in Education
| Others |
| SAITM | South Asian Institute of Technology and Medicine
| Others |
| SAITR1 | Special Artificier (instruments-typewriter Repair) Petty Officer 1st Class
| Others |
| SAITR2 | Special Artificier (instruments-typewriter Repair) Petty Officer 2nd Class
| Others |
| SAITR3 | Special Artificier (instruments-typewriter Repair) Petty Officer 3rd Class
| Others |