| SIRF | Scientist In Residence Fellowship 
| Others |
| SIRF | Seafood Industry Research Fund
| Others |
| SIRF | Service Industry Relief Festivities
| Others |
| SIRF | Sewerage Incident Report Form
| Others |
| SIRF | Solomon Islands Resource Facility
| Others |
| SIRF | Southern Investigative Reporting Foundation
| Others |
| SIRF | Spend to Impact Response Functions
| Others |
| SIRF | Spiral Inductor Resonator Filter
| Others |
| SIRF | Stockton International Riverside Festival
| Others |
| SIRF | Stolen Identity Refund Fraud
| Others |
| SIRF | Strategic Industry Research Foundation
| Others |
| SIRF | Structural Integrity Research Foundation
| Others |
| SIRF | Student Instructional Rating Form
| Others |
| SIRF | Student Involvement and Representation Fee
| Others |
| SIRF | Student Involvement Representation Fee
| Others |
| SIRF | Submersion Incident Report Form
| Others |
| SIRF | Sustainability Initiatives Revolving Fund
| Others |
| SIRF | Syria INGO Regional Forum
| Others |