| Acronym | Definition |
|---|
| SIAP | Statistical Institute for Asia and the Pacific (UN ESCAP) |
| SIAP | Single Integrated Air Picture |
| SIAP | Social Impact of the Arts Project (University of Pennsylvania; est. 1994) |
| SIAP | Sociedad Interamericana de Planificación (Spanish: Inter-American Planning Society) |
| SIAP | Standard Instrument Approach Procedure |
| SIAP | System Integrity Assurance Program (US NASA) |
| SIAP | SIDS Initial Assessment Profile |
| SIAP | Système d'Information et d'Aide aux Promotions (French: System Information and Support for Promotions) |
| SIAP | Security in Iraq Accountability Panel (United Nations) |
| SIAP | Society of Iranian Architects & Planners |
| SIAP | Stable Image Assurance Program (Dell Inc.) |
| SIAP | Sensory Impairment Action Plan |
| SIAP | Sorry If Already Posted |
| SIAP | Sonobuoy Interference Avoidance Plan |
| SIAP | Surveillance Integration Automation Project |
| SIAP | Shut-In Annular Pressure |
| SIAP | Speakers' Information & Activity Package |