| Acronym | Definition |
|---|
| SIAD➣Supersonic Inflatable Aerodynamic Decelerator (US NASA) |
| SIAD➣Sierra Army Depot |
| SIAD➣Short Interval Additional Dose (medication) |
| SIAD➣Serial Interface Adapter Device |
| SIAD➣Self Injury Awareness Day |
| SIAD➣Statistical Information Analysis Division |
| SIAD➣Sustainable Integrated Area Development |
| SIAD➣Système Informatique d'Aide à la Décision (French: decision support system) |
| SIAD➣Societa Italiana Acetilene e Derivati (Italian: Italian Company of Acetylene and Derivatives; Bergamo, Italy) |
| SIAD➣Syndrome of Inappropriate Antidiuretic Hormone Secretion |
| SIAD➣Système d'Information et d'Aide au Détachement (French: System Information and Support Secondment) |
| SIAD➣Synergistic Isogenous Active Decontamination (Synergena) |
| SIAD➣Smart Integrated Access Device |
| SIAD➣Sisteme de Asistare a Deciziei (Romania) |
| SIAD➣Society of Illustrators, Artists & Designers |