| Subject | German | English |
| IT | FM-FM-System | FM-FM system |
| IT | FM-AM-System | FM-AM system |
| radio | FM-Multiplex-System beim Stereorundfunk | polar-modulation system for stereophonic broadcasting |
| IT, el. | FM-System | frequency-modulation system |
| el. | Frequenztoleranz eines FM Systems | frequency-modulation deviation |
| el. | Frequenztoleranz eines FM Systems | frequency deviation of the FM system |