| Acronym | Definition |
|---|
| SIAS | Statutory Inspection of Anglican Schools (UK) |
| SIAS | School of Indigenous Australian Studies (James Cook University; Australia) |
| SIAS | Sistema Integral de Atención en Salud (Guatemala) |
| SIAS | Society of Inner Asian Studies (Japan) |
| SIAS | Say It Ain't So |
| SIAS | Standard Intel Architecture Servers |
| SIAS | Scandinavian Institute of African Studies |
| SIAS | Submarine Integrated Antenna System |
| SIAS | Socioeconomic Impact Analysis Study |
| SIAS | Student Information Access System (Illinois State University) |
| SIAS | Scanner Interface Assembly Signal |
| SIAS | Signal Intelligence Analysis System |
| SIAS | Securities and Investment Advisory Solutions (Milton, MA) |