| Acronym | Definition |
|---|
| FIRC➣Flight Instructor Refresher Clinic (US FAA) |
| FIRC➣Fondazione Italiana per la Ricerca sul Cancro (Italian: Italian Foundation for Cancer Research) |
| FIRC➣Flanders International Rally Challenge (Belgium) |
| FIRC➣Flight Instructor Refresher Course (US FAA) |
| FIRC➣Foreign Inward Remittance Certificate |
| FIRC➣Foundations of Independent Research and Communications (educational course) |
| FIRC➣Fixed Income Rates and Currencies |
| FIRC➣Federal Islamic Republic of the Comoros |
| FIRC➣Finite Impulse Response Channel |