| PIRT | Pan India Road Trip 
| Others |
| PIRT | PDF Image Replacement Tool
| Others |
| PIRT | Performance Indicator Reporting Tool
| Others |
| PIRT | Pesticide Inspector Regulatory Training
| Others |
| PIRT | Pesticide Inspector Residential Training
| Others |
| PIRT | Phenomena Identification and Ranking Table
| Others |
| PIRT | Phosphoinositide Interacting Regulator of TRP
| Others |
| PIRT | Physics Instructional Resource Team
| Others |
| PIRT | Policy of Insurance of Record Title
| Others |
| PIRT | Preschool Intervention and Referral Team
| Others |
| PIRT | Preschool Intervention Referral Team
| Others |
| PIRT | Pretreatment Implementation Review Task
| Others |
| PIRT | Privacy Incident Response Team
| Others |
| PIRT | Professional Improvement Resource Team
| Others |
| PIRT | Psychological Intervention Research Team
| Others |
| PIRT | Public Information Request Tracking
| Others |
| PIRT | Public Involvement Resources and Training
| Others |
| PIRT | Public Involvment Resources and Training
| Others |
| PIRT | Purposeful Interference Response Team
| Others |
| PIRT | Python Image Registration Toolkit
| Others |