Definition of "FS"

Initialism of fingerspelling.  examples

(cryptography) Initialism of forward secrecy.  examples

(military, nautical, exonym) Initialism of French ship (a ship of the military of the Fifth Republic of France (used as a ship prefix)).

(US) Initialism of forest service.  examples

Initialism of full service (“full sexual activity in prostitution”).  examples

Abbreviation of fingerspell.  examples