| SIIP | S Ii Integrated Product 
| Others |
| SIIP | Sa Inti International Program
| Others |
| SIIP | Safety Innovations In Practice
| Others |
| SIIP | Screening Interview For Initial Placement
| Others |
| SIIP | Site Integration Installation Plan
| Others |
| SIIP | Small Industry Incentive Program
| Others |
| SIIP | Smallholder Irrigation Improvement Project
| Others |
| SIIP | Spatially Intermittent Initiation Points
| Others |
| SIIP | Springfield Interchange Improvement Project
| Others |
| SIIP | Standard Information Interchange Processes
| Others |
| SIIP | Statistical Instruction Internet Palette
| Others |
| SIIP | Sugar Industry Infrastructure Program
| Others |
| SIIP | Summer International Internship Programme
| Others |
| SIIP | Surface Irrigation Improvement Project
| Others |
| SIIP | Systemic Instructional Improvement Program
| Others |
| SIIP | Systems Integration And Implementation Plan
| Others |