| 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 |
