| Acronym | Definition |
|---|
| FSK | Frequency Shift Keying |
| FSK | Freiwillige Selbstkontrolle (German movie rating organization) |
| FSK | Francis Scott Key |
| FSK | Francis Scott Key High School (Union Bridge, MD) |
| FSK | Foil/Scrim/Kraft (tape) |
| FSK | Forces de Sécurité du Kosovo (French: Security Forces in Kosovo; Kosovo) |
| FSK | France Shotokan Karaté (French martial arts school) |
| FSK | Francis Scott Key Bridge (Maryland) |
| FSK | Forsvarets Spesial Kommando (norwegian special forces) |
| FSK | Farming Systems Kenya (Kenya) |
| FSK | Fremdsprachenkorrespondent (German: foreign language correspondent) |
| FSK | Federalnaya Sluzhba Kontrazwedki (Russian: Federal Counter-Intelligence Service) |