*auch ratlos guck*
Wiki hilft ebenfalls nicht wirklich weiter:
FSK can have alternative meanings:
* FSK (Russia) (Federalnaya Sluzhba Kontrrazvedki (Федера́льная Слу́жба Контрразве́дки), Federal Counterintelligence Service of Russia)
* Frequency-shift keying, an electronic communications modulation scheme
* Forsvarets Spesialkommando (FSK), a Norwegian special forces military unit
* FSK (band), a German band
* Freiwillige Selbstkontrolle der Filmwirtschaft (FSK), a German movie rating organization
* Fsk, pen name for Boštjan Čadež, creator of Line Rider