Rank | Abbreviation | Meaning |
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***** | PIRR | Project Internal Rate of Return
| |
**** | PIRR | Program Information Request Release
| |
*** | PIRR | Polski Instytut Rozwoju Rynku
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** | PIRR | Participating Individual Ready Reserve
| |
** | PIRR | Pipe Inspection Round Robin
| |
** | PIRR | Preliminary Investigation Request Response
| |
** | PIRR | Pi times Radius Squared
| |
** | PIRR | Prepositioned War Reserve Interrogation and Readiness Reporting
| |
** | PIRR | Payload Increment Readiness Review
| |
* | PIRR | Polarized IR Reflection
| |
* | PIRR | Participating Individual Ready Reservist
| |
* | PIRR | percent increase ratio of RL
| |
* | PIRR | Permit Issuance and Right of Renewal
| |
* | PIRR | Peripheral Inflammatory Root Resorption
| |
* | PIRR | Plug in Replacement Relay
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* | PIRR | Partners in Reducing Re
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