| Subject | German | English |
| forestr. | Balsam fir | balsam fir (Abies balsamea, Abies balsamifera) |
| el. | FIR-Filter | nonrecursive filter |
| el. | FIR-Filter | transversal filter |
| el. | FIR-Filter | FIR filter |
| commun. | FIR-Filter | finite impulse response filter (digital audio coding) |
| el. | FIR-Filter | finite impulse response filter |
| tech. | FIR-Grenze | flight information region boundary |
| gen. | FIR-Interferometer | FIR interferometer |